1. Finding Areas of Shapes

2. AREA

3. What is Height?

4. You must make sure you have perpendicularity!
Height
A distance that is perpendicular to a base
Perpendicular means forming a 90° angle with a side (base)
You must make sure you have perpendicularity!

5. Height of a Triangle The height of a triangle Select two vertices
Call the line segment joining these two vertices the base
Find the third vertex
Draw a segment from the third vertex to the base
*What if you had selected two different vertices?

6. Shape Cutter Tool

7. What are some of the characteristics of a rectangle?

9. What are some of the characteristics of a parallelogram?

11. Why Does That Work? Exchanging Repurposing Recycling Reusing
What is happening to the area of the figure we are “cutting off”?
Exchanging
Repurposing
Recycling
Reusing

21. What are some of the characteristics of a trapezoid?