Area of polygons worksheet

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

1 a.

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

triangle with vertices (0, 1), (0, 8), and (-7, 1).
 
 
 
 
2 a.

triangle with vertices (4, -8), (4, 6), and (9, -8).
 
 
 
 
2 b.

triangle with vertices (-7, -8), (-7, -7), and (-1, -8).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 9 square units.

 
1 b. 

The area is 24.5 square units.

 
2 a. 

The area is 35 square units.

 
2 b. 

The area is 3 square units.

 


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