Area of polygons worksheet

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

1 a.

triangle with vertices (8, -8), (-9, 2), and (-1, 7).
 
 
 
 
1 b.

quadrilateral with vertices (-7, 6), (10, 9), (2, -7), and (-3, -1).
 
 
 
 
2 a.

quadrilateral with vertices (-4, 2), (4, 4), (1, -9), and (-10, -6).
 
 
 
 
2 b.

quadrilateral with vertices (-8, 3), (3, 4), (0, -7), and (-10, -9).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 82.5 square units.

 
1 b. 

The area is 129.5 square units.

 
2 a. 

The area is 102 square units.

 
2 b. 

The area is 117 square units.

 


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