Area of polygons worksheet

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

1 a.

triangle with vertices (-2, 9), (-6, 4), and (2, -9).
 
 
1 b.

quadrilateral with vertices (0, 9), (2, 6), (5, -4), and (-5, -8).
 
 
2 a.

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

triangle with vertices (-1, 4), (-2, 8), and (-5, 5).
 
 
Page 2

Answer Key

1 a. 

The area is 46 square units.

 
1 b. 

The area is 80.5 square units.

 
2 a. 

The area is 12 square units.

 
2 b. 

The area is 7.5 square units.

 


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