Area of polygons worksheet

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

1 a.

triangle with vertices (-2, 5), (-2, -2), and (7, 5).
 
 
 
 
1 b.

triangle with vertices (-9, -9), (-9, 5), and (-6, -9).
 
 
 
 
2 a.

trapezoid with vertices (-3, 7), (2, 7), (2, -7), and (-9, -7).
 
 
 
 
2 b.

trapezoid with vertices (-1, 7), (1, 7), (1, -6), and (-1, -9).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 31.5 square units.

 
1 b. 

The area is 21 square units.

 
2 a. 

The area is 112 square units.

 
2 b. 

The area is 29 square units.

 


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