Area of polygons worksheet

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

1 a.

triangle with vertices (-8, 9), (-8, 5), and (4, 9).
 
 
 
 
1 b.

triangle with vertices (-7, 3), (-7, -2), and (-1, 3).
 
 
 
 
2 a.

triangle with vertices (2, -4), (2, -3), and (-2, -4).
 
 
 
 
2 b.

triangle with vertices (5, 8), (5, -1), and (0, 8).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 24 square units.

 
1 b. 

The area is 15 square units.

 
2 a. 

The area is 2 square units.

 
2 b. 

The area is 22.5 square units.

 


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