Area of polygons worksheet

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

1 a.

triangle with vertices (-2, -10), (-2, 0), and (6, -10).
 
 
 
 
1 b.

triangle with vertices (7, -2), (7, -5), and (-6, -2).
 
 
 
 
2 a.

triangle with vertices (1, -5), (1, 6), and (3, -5).
 
 
 
 
2 b.

triangle with vertices (6, -5), (6, -2), and (-3, -5).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 40 square units.

 
1 b. 

The area is 19.5 square units.

 
2 a. 

The area is 11 square units.

 
2 b. 

The area is 13.5 square units.

 


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