Back to all courses

# Geometry Fundamentals (2019)

## This Brilliant course is retiring soon. Check out our new Geometry Fundamentals course!

This Brilliant course is retiring soon. Check out our new Geometry Fundamentals course!

32

260+
1. 1

### Introduction

Explore the foundations of geometry without any rote memorization.

1. #### Exploring Length

Use your intuition and reasoning to find distances across and around shapes.

2. #### Angle Hunt

What's the missing angle?

3. #### Working with Areas

Manipulate shapes and apply your intuition and creativity to find areas.

2. 2

### 2D Geometry

Find areas, perimeters, and more with common sense, not memorized formulas!

1. Included with

#### Angle Hunting

Explore the relationships between angles that are in linear pairs, vertical pairs, and triangles.

2. Included with

#### Polygon Areas

Find the areas of these polygons using your own reasoning rather than memorized formulas.

3. Included with

#### Circles

Cut, rearrange, and strategize to solve these circle area problems.

4. Included with

#### Perimeters

Explore the paths that pass through and around these polygons and circles.

3. 3

### Going 3D

Explore 3D shapes using logic and intuition rather than formulas.

1. Included with

#### Nets

Fold up flat patterns to make 3D polyhedra.

2. Included with

#### Slicing Figures

Dice, slice, and explore the cross-sections of 3D solids.

3. Included with

#### Surface Area

Use your ingenuity to strategically solve for these surface areas.

4. Included with

#### Volume

Pack the 3D volume of one solid shape with other, smaller solids!

4. 4

### Pythagoras' Geometry

Applying variables and algebraic techniques to the study of geometry.

1. Included with

#### Working Backward

Start from the goal and work back to the beginning.

2. Included with

#### The Pythagorean Theorem

Derive and use one of the most famous of all theorems.

3. Included with

#### Geometric Ratios

Learn clever techniques for comparing areas and lengths.

4. Included with

#### Similarity

In these challenges the same shape has been scaled to a variety of different sizes.

5. 5

### The Coordinate Plane

How geometry becomes algebra.

1. Included with

#### The Coordinate Plane

Combine geometry with algebra!

2. Included with

#### Distance on a Graph

Find how far it is between here and there.

3. Included with