Area of polygons worksheet

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

1 a.

triangle with vertices (0, 0), (-9, 6), and (8, 10).
 
 
 
 
1 b.

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

triangle with vertices (2, 8), (-7, 1), and (-5, 10).
 
 
 
 
2 b.

quadrilateral with vertices (-3, 10), (9, 6), (8, -8), and (-1, -4).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 69 square units.

 
1 b. 

The area is 86.5 square units.

 
2 a. 

The area is 33.5 square units.

 
2 b. 

The area is 145 square units.

 


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