Geometry Notes

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Geometry Notes — Lengths Within and Around Circles

Geometry — Practice Quiz on Angles of Circles

Geometry Notes — Other Angles of Circles

Geometry Notes — Inscribed Angles

Geometry Notes — Arcs and Central Angle

Geometry Notes — Chords of Circles

Geometry Notes — Tangents of Circles

Geometry Notes — Circles

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Geometry Notes — Law of Cosines — Video

Geometry Notes — Law of Sines — Video

Geometry Notes — Angles of Elevation and Depression

Geometry Notes — Trigonometric Ratios — Video

Geometry Notes — Trigonometry; Sine, Cosine, and Tangent Ratios

Geometry Notes — Trigonometry and Indirect Measurement Example — Video

Geometry Notes — Legend of Sohcahtoa

Geometry Notes — Introduction to Trigonometry; Tangent Ratio

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Special Right Triangles – 45-45-90 and 30-60-90

Biography — Hippasus

Similar Right Triangles and Geometric Mean

Pythagorean Theorem and its Converse

History — The Golden Ratio

Similar Triangles and Polygons 2

Similar Polygons

Proportions

Ratios

History — The Platonic Solids

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Chapter 6

Kite

Trapezoid, Isosceles Trapezoid, Median of a Trapezoid

Special Parallelogram — Square

Special Parallelogram — Rhombus

Special Parallelogram — Rectangle

Proving that Quadrilaterals are Parallelograms

Parallelograms

Quadrilaterals

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Chapter 5

The Triangle Inequality Theorem

Midsegment of a Triangle

The Euler Line

Biography — Leonhard Paul Euler

Segments of Triangles, The Centers of Triangles – Actually 4 of the 9

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Chapter 4

CPCTC — Corresponding Parts of Congruent Triangles are Congruent

Proving Triangles Congruent 4 — Right Triangles — HL, HA, LL, LA

Proving Triangles Congruent 3 — What about AAA and SSA?

Proving Triangles Congruent 2 — ASA, AAS

Proving Triangles Congruent 1 — SSS, SAS

Congruent Triangles

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Chapter 3

A Table of some polygon data

Angles of polygons example

Angles of Polygons

Naming Polygons

Polygons

Isosceles Triangles

Exterior Angles of a Triangle

Interior Angles of a Triangle

Types of Triangles — Practice

Triangle Basics and Triangle Classifications

Ways to Prove Lines Parallel

Parallel Lines and The Angles

Name those angles

Lines: Intersecting, Parallel, and Skew

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Chapter 2

Six of my Favorite Basic Theorems

Two-Column Proofs

Algebraic Properties of Equality and Properties of Congruence

Conditionals and Other Statements

History — Euclid

Special Pairs of Angles

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Chapter 1

Congruent Angles

Angles

Segments

Segments and Rays

Undefined Terms and Other Basic Terms

Welcome to Geometry

Geometry Standards

Geometry Sections