Area of polygons worksheet

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

1 a.

triangle with vertices (-9, 2), (-2, -10), and (-9, -2).
 
 
 
 
1 b.

triangle with vertices (1, -2), (0, 9), and (-2, -6).
 
 
 
 
2 a.

quadrilateral with vertices (-5, 7), (7, 0), (7, -5), and (-3, -7).
 
 
 
 
2 b.

quadrilateral with vertices (-7, 7), (7, 5), (3, -10), and (-9, -5).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 14 square units.

 
1 b. 

The area is 18.5 square units.

 
2 a. 

The area is 102 square units.

 
2 b. 

The area is 186 square units.

 


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