Area of polygons worksheet

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

1 a.

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

triangle with vertices (-8, 6), (-8, 0), and (6, 6).
 
 
2 a.

triangle with vertices (-1, 6), (-1, 9), and (-6, 6).
 
 
2 b.

triangle with vertices (-2, -1), (-2, 10), and (-6, -1).
 
 
Page 2

Answer Key

1 a. 

The area is 21 square units.

 
1 b. 

The area is 42 square units.

 
2 a. 

The area is 7.5 square units.

 
2 b. 

The area is 22 square units.

 


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