Area of polygons worksheet

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

1 a.

triangle with vertices (0, 9), (0, 7), and (1, 9).
 
 
 
 
1 b.

trapezoid with vertices (3, 8), (8, 8), (6, 1), and (0, 1).
 
 
 
 
2 a.

trapezoid with vertices (0, 5), (10, 5), (10, 4), and (1, 4).
 
 
 
 
2 b.

triangle with vertices (1, 8), (1, 10), and (4, 8).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 1 square units.

 
1 b. 

The area is 38.5 square units.

 
2 a. 

The area is 9.5 square units.

 
2 b. 

The area is 3 square units.

 


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