Area of polygons worksheet

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

1 a.

triangle with vertices (-5, 1), (-5, 4), and (2, 1).
 
 
 
 
1 b.

triangle with vertices (-2, 4), (-2, 9), and (10, 4).
 
 
 
 
2 a.

triangle with vertices (2, -4), (2, 0), and (-4, -4).
 
 
 
 
2 b.

triangle with vertices (9, -6), (9, 3), and (0, -6).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 10.5 square units.

 
1 b. 

The area is 30 square units.

 
2 a. 

The area is 12 square units.

 
2 b. 

The area is 40.5 square units.

 


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