Why Should You Learn About Planar Figures?

What Are Lines, Line Segments and Rays?

What Are Edges, Vertices and Angles?

What Are Acute, Obtuse and Right Angles?

What Is a Circle?

What Is the Angle Sum of a Triangle?

How Do You Solve Problems to Find Unknown Angles?

What Is the Angle Sum of a Quadrilateral?

What Is a Point and a Line Segment?

How to Construct Two Parallel Lines

Constructing a 60°, 30° or 15° Angle

Constructing a 90°, 45° or 22.5° Angle

What Is a Triangle?

What Are Acute, Obtuse and Right Triangles?

What Is a Quadrilateral?

What Are Trapezoids and Scalene Quadrilaterals?