Area of polygons worksheet

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

1 a.

triangle with vertices (-3, 8), (-3, -7), and (7, 8).
 
 
 
 
1 b.

triangle with vertices (-8, 8), (-8, 10), and (5, 8).
 
 
 
 
2 a.

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

triangle with vertices (-3, 2), (-3, 0), and (5, 2).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 75 square units.

 
1 b. 

The area is 13 square units.

 
2 a. 

The area is 16.5 square units.

 
2 b. 

The area is 8 square units.

 


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