Area of polygons worksheet

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

1 a.

triangle with vertices (10, 4), (10, 9), and (1, 4).
 
 
 
 
1 b.

triangle with vertices (10, 1), (10, 7), and (0, 1).
 
 
 
 
2 a.

triangle with vertices (9, 7), (9, 0), and (3, 7).
 
 
 
 
2 b.

triangle with vertices (9, 8), (9, 9), and (1, 8).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 22.5 square units.

 
1 b. 

The area is 30 square units.

 
2 a. 

The area is 21 square units.

 
2 b. 

The area is 4 square units.

 


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