Area of polygons worksheet

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

1 a.

triangle with vertices (4, -9), (4, 7), and (1, -9).
 
 
 
 
1 b.

triangle with vertices (-7, -1), (-7, 0), and (-5, -1).
 
 
 
 
2 a.

triangle with vertices (3, -10), (3, 2), and (6, -10).
 
 
 
 
2 b.

triangle with vertices (-6, 4), (-6, 8), and (-7, 4).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 24 square units.

 
1 b. 

The area is 1 square units.

 
2 a. 

The area is 18 square units.

 
2 b. 

The area is 2 square units.

 


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