Area of polygons worksheet

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

1 a.

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

triangle with vertices (-3, 6), (-3, -3), and (-4, 6).
 
 
 
 
2 a.

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

triangle with vertices (0, 9), (0, -1), and (9, 9).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 112.5 square units.

 
1 b. 

The area is 4.5 square units.

 
2 a. 

The area is 32 square units.

 
2 b. 

The area is 45 square units.

 


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