Area of polygons worksheet

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

1 a.

triangle with vertices (-10, -5), (10, 8), and (-5, -1).
 
 
 
 
1 b.

quadrilateral with vertices (-5, 1), (5, 6), (0, 0), and (-10, -7).
 
 
 
 
2 a.

triangle with vertices (-9, 5), (0, 7), and (-2, -5).
 
 
 
 
2 b.

quadrilateral with vertices (0, 1), (3, 7), (5, -9), and (-8, -5).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 7.5 square units.

 
1 b. 

The area is 40 square units.

 
2 a. 

The area is 52 square units.

 
2 b. 

The area is 85 square units.

 


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