Area of polygons worksheet

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

1 a.

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

triangle with vertices (5, -1), (5, 8), and (6, -1).
 
 
2 a.

triangle with vertices (-10, 3), (-10, -3), and (10, 3).
 
 
2 b.

triangle with vertices (8, -8), (8, 3), and (-3, -8).
 
 
Page 2

Answer Key

1 a. 

The area is 3 square units.

 
1 b. 

The area is 4.5 square units.

 
2 a. 

The area is 60 square units.

 
2 b. 

The area is 60.5 square units.

 


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