Mathematics · Core High School

Geometry Instruction.

Geometry is where students first learn to build a mathematical argument. Every proof is a small essay in symbolic reasoning — and every strong Geometry student thinks more clearly for the rest of their academic life.

Mr. Sharma teaches Geometry as a course in reasoning, not memorization. Students learn to see the structure behind every diagram and write proofs that read like clean, confident arguments.

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Course Snapshot

Geometry at a glance.

The essentials every student and family should understand before beginning coursework or tutoring.

Course Level
Grades 9 – 11
Duration
Full academic year
Prerequisites
Algebra 1 fluency
Next Course
Algebra 2
Standardized Alignment
NY Geometry Regents · SAT · ACT
Format
One-on-one live online tutoring

Section 01

Course Overview

Geometry integrates visual reasoning, symbolic argument, and algebraic technique into one course. It is the bridge between concrete arithmetic and formal mathematical thinking.

Students study the properties of lines, angles, triangles, quadrilaterals, circles, and three-dimensional solids — and, more importantly, learn to justify every claim with a valid proof.

The course combines classical Euclidean geometry with coordinate geometry, transformations, similarity, right-triangle trigonometry, and an introduction to circle theorems. Every idea is built on the axioms and definitions of the previous chapter.

Section 02

Major Units

The core structure of the course — every student progresses through these units in a deliberate, connected sequence.

  1. Unit 01

    Foundations & Reasoning

    Points, lines, planes, angles, and the structure of a proof.

  2. Unit 02

    Parallel Lines & Angles

    Angle relationships formed by transversals and parallel lines.

  3. Unit 03

    Triangles & Congruence

    Triangle properties, congruence criteria, and formal congruence proofs.

  4. Unit 04

    Similarity

    Ratios, proportions, similar triangles, and dilations.

  5. Unit 05

    Right Triangles & Trigonometry

    Pythagorean theorem, special right triangles, and SOHCAHTOA.

  6. Unit 06

    Quadrilaterals & Polygons

    Parallelograms, trapezoids, and interior/exterior angle theorems.

  7. Unit 07

    Circles

    Chords, tangents, secants, arcs, and inscribed-angle relationships.

  8. Unit 08

    Area, Surface Area & Volume

    Plane area, surface area, and volumes of prisms, pyramids, cylinders, cones, and spheres.

  9. Unit 09

    Transformations & Coordinate Geometry

    Rigid motions, dilations, and proofs in the coordinate plane.

Section 03

Complete Topic & Subtopic Tree

Every topic covered in the full course, broken down into the specific subtopics Mr. Sharma teaches one-on-one.

Reasoning & Proof

Logic

  • Conditional statements
  • Biconditionals
  • Converses & contrapositives
  • Counterexamples

Proof Structure

  • Two-column proofs
  • Paragraph proofs
  • Flowchart proofs
  • Indirect proof

Foundations

  • Points, lines, planes
  • Segment addition
  • Angle addition
  • Definitions & postulates

Triangles

Classification

  • By sides
  • By angles
  • Interior & exterior angles

Congruence

  • SSS
  • SAS
  • ASA
  • AAS
  • HL

Special Segments

  • Medians
  • Altitudes
  • Perpendicular bisectors
  • Angle bisectors

Inequalities

  • Triangle inequality
  • Hinge theorem
  • Exterior angle inequality

Similarity & Trigonometry

Similarity

  • AA
  • SAS similarity
  • SSS similarity
  • Proportional segments

Right Triangles

  • Pythagorean theorem
  • Converse of Pythagorean
  • Geometric mean

Trigonometry

  • Sine, cosine, tangent
  • Inverse trig
  • Special right triangles

Circles & Solids

Circle Theorems

  • Central & inscribed angles
  • Chord-chord & secant-secant
  • Tangent lines
  • Arc length & sector area

Coordinate Geometry

  • Distance formula
  • Midpoint
  • Equation of a circle
  • Coordinate proofs

Solids

  • Prisms & cylinders
  • Pyramids & cones
  • Spheres
  • Cross-sections

Section 04

Skills Developed

The underlying skills every student builds in this course — the durable abilities that carry through to advanced coursework and standardized exams.

Skill

Conceptual Understanding

Learning why the mathematics or science works — not just which button to press.

Skill

Problem-Solving Fluency

Breaking multi-step problems into manageable, repeatable moves.

Skill

Precise Notation & Language

Writing arguments cleanly enough that another mathematician or scientist can follow them.

Skill

Quantitative Reasoning

Choosing the right structure and estimating whether an answer is plausible.

Skill

Independent Study Habits

Reading a textbook, working through examples, and self-checking without a teacher present.

Skill

Exam Readiness

Sustained accuracy under timed conditions, on both school exams and standardized tests.

Section 05

Common Student Challenges

The patterns Mr. Sharma sees most often — and exactly how each is addressed during tutoring.

Section 06

Why Geometry Matters

Why this course is one of the highest-leverage academic investments a family can make.

Why It Matters

The First Course in Mathematical Argument

Geometry is where students learn to justify claims formally. That habit transfers to every advanced course in mathematics and science.

Why It Matters

Trigonometry Foundation

Right-triangle trigonometry introduced here is the foundation for Precalculus, Calculus, and Physics.

Why It Matters

SAT & ACT Support

The Geometry & Trigonometry content domain on the SAT and the geometry questions on the ACT draw directly from this course.

Why It Matters

Regents Preparation

The NY Geometry Regents is one of the three required Regents math exams — mastery here matters for graduation.

Why It Matters

Spatial Reasoning

Three-dimensional geometry builds the spatial intuition engineers, architects, and scientists rely on.

Why It Matters

Bridge to Algebra 2

Coordinate geometry, systems, and inequalities appear again in Algebra 2 — Geometry keeps algebraic skills sharp.

Section 07

Connections to Other STEM Subjects

How Geometry connects to the rest of the Mr. Sharma curriculum — the courses it prepares students for, and the exams it supports.

Connection

Algebra 1

Every coordinate-geometry problem uses Algebra 1 equations of lines and systems.

Connection

Algebra 2

Conic sections in Algebra 2 generalize the circles and parabolas introduced here.

Connection

Precalculus & Trigonometry

Right-triangle trig extends into the unit circle and trigonometric functions.

Connection

Physics

Vectors, force diagrams, and rotational motion all rest on geometric reasoning.

Connection

SAT & ACT

Roughly 15 – 25 percent of standardized math questions test geometric reasoning directly.

Connection

Engineering & Architecture

Real-world design and CAD work rely on the same three-dimensional geometry taught in this course.

Advanced STEM Library

Comprehensive Geometry Formula Sheet.

A single premium reference covering every formula, definition, and result the course expects — organized by unit, written by Mr. Sharma. The full sheet is being authored and will be published in the Advanced STEM Library.

Visit the Advanced STEM Library
Coming Soon

Geometry Formula & Reference Sheet

Every key formula, definition, theorem, and reference students need — organized by unit and cross-referenced to the topic tree above.

  • Foundations & Reasoning
  • Parallel Lines & Angles
  • Triangles & Congruence
  • Similarity
  • Right Triangles & Trigonometry
  • Quadrilaterals & Polygons

Free Resources

A growing library of premium references.

Curated reference material for every Geometry student. Full guides are being written by Mr. Sharma and will appear in the Advanced STEM Library as they are published.

Coming Soon
Resource

Geometry · Formula Sheet

Every angle, triangle, circle, and volume formula in one organized reference.

Coming Soon
Resource

Geometry · Proof Templates

The core proof structures — two-column, paragraph, and coordinate — with worked examples.

Coming Soon
Resource

Geometry · Circle Theorems Guide

Every inscribed-angle, chord, and tangent relationship in one place.

Coming Soon
Resource

Geometry · Trigonometry Guide

SOHCAHTOA, special right triangles, and applied trigonometry problems.

Coming Soon
Resource

Geometry · Regents Study Guide

A calibrated review plan for the NY Geometry Regents examination.

How Mr. Sharma Teaches

A six-step path from first call to full mastery.

Every student follows the same disciplined arc — from an honest starting point to sustained fluency in the material.

  1. Step 01

    Initial Consultation

    A no-pressure conversation about goals, timeline, and current coursework.

  2. Step 02

    Diagnostic Assessment

    A focused diagnostic identifies exactly where each unit of the course stands.

  3. Step 03

    Personalized Learning Plan

    A written plan mapped to the student's timeline, coursework, and academic goals.

  4. Step 04

    Concept Mastery

    Underlying concepts are rebuilt where needed — every skill stands on real understanding.

  5. Step 05

    Guided Problem Solving

    One-on-one whiteboard instruction on every difficult problem type in the course.

  6. Step 06

    Assessment Preparation

    Targeted preparation for school assessments, standardized exams, and course finals.

Study Plans

Four premium tutoring timelines.

Each plan is a starting framework. Every student's actual schedule is customized after the diagnostic assessment.

4-Week

Intensive

Focused refinement for students already at a strong baseline heading into a major assessment.

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8-Week

Standard

Targeted work on the highest-impact units of the course plus consistent problem practice.

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12-Week

Comprehensive

Full concept review, unit-by-unit mastery, and periodic assessment checkpoints.

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Full Year

Mastery

The deepest preparation — foundations rebuilt, every unit mastered, ready for the next course in the sequence.

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FAQ

Frequently Asked Questions

The questions families most often ask before beginning tutoring in this subject.

Ready to Begin

One-on-one geometry instruction with Mr. Sharma.

Book a free consultation to discuss your student's current coursework, goals, and timeline. Every plan is built from an honest starting point.

Begin

Start with a focused strategy conversation.

The strategy session is the first step of working together — a focused academic planning and diagnostic conversation used to understand the student before any ongoing academic support begins.

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