Area of polygons worksheet

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

1 a.

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

triangle with vertices (5, -4), (5, -2), and (10, -4).
 
 
 
 
2 a.

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

triangle with vertices (8, -9), (8, -5), and (1, -9).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 66 square units.

 
1 b. 

The area is 5 square units.

 
2 a. 

The area is 4 square units.

 
2 b. 

The area is 14 square units.

 


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