Area of polygons worksheet

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

1 a.

triangle with vertices (3, 9), (3, 2), and (8, 9).
 
 
 
 
1 b.

triangle with vertices (8, 6), (8, 1), and (0, 6).
 
 
 
 
2 a.

triangle with vertices (3, 4), (3, 3), and (5, 4).
 
 
 
 
2 b.

triangle with vertices (4, 7), (4, 10), and (6, 7).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 17.5 square units.

 
1 b. 

The area is 20 square units.

 
2 a. 

The area is 1 square units.

 
2 b. 

The area is 3 square units.

 


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