Area of polygons worksheet

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

1 a.

triangle with vertices (7, 0), (3, 1), and (8, 0).
 
 
 
 
1 b.

triangle with vertices (6, 1), (8, 9), and (7, 9).
 
 
 
 
2 a.

triangle with vertices (8, 4), (5, 1), and (7, 1).
 
 
 
 
2 b.

quadrilateral with vertices (0, 7), (7, 7), (10, 4), and (0, 1).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 0.5 square units.

 
1 b. 

The area is 4 square units.

 
2 a. 

The area is 3 square units.

 
2 b. 

The area is 40.5 square units.

 


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