Area of polygons worksheet

Find the area of the shapes when their vertices are given.

1 a.

trapezoid with vertices (-89, 29), (73, 56), (73, -27), and (-89, -66).
 
 
 
 
1 b.

triangle with vertices (50, -31), (50, -38), and (20, -31).
 
 
 
 
2 a.

triangle with vertices (-23, 44), (-23, 57), and (-65, 44).
 
 
 
 
2 b.

triangle with vertices (-60, 29), (-60, 95), and (37, 29).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 14418 square units.

 
1 b. 

The area is 105 square units.

 
2 a. 

The area is 273 square units.

 
2 b. 

The area is 3201 square units.

 


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