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 Are Rectangles, Squares, Parallelograms and Rhombuses?

What Is the Perimeter Formula for a Quadrilateral?

What Is the Area Formula for Rectangles, Squares, Parallelograms and Rhombuses?

How Do You Calculate the Areas of Rectangles, Squares, Parallelograms and Rhombuses?

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?