Area of polygons worksheet

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

1 a.

triangle with vertices (1, 7), (1, -6), and (-10, 7).
 
 
 
 
1 b.

triangle with vertices (-8, 5), (-8, 7), and (-9, 5).
 
 
 
 
2 a.

triangle with vertices (1, 1), (1, -7), and (4, 1).
 
 
 
 
2 b.

triangle with vertices (6, -2), (6, 10), and (4, -2).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 71.5 square units.

 
1 b. 

The area is 1 square units.

 
2 a. 

The area is 12 square units.

 
2 b. 

The area is 12 square units.

 


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