Area of polygons worksheet

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

1 a.

triangle with vertices (5, 10), (6, 1), and (1, 0).
 
 
 
 
1 b.

triangle with vertices (4, 4), (1, 3), and (9, 9).
 
 
 
 
2 a.

triangle with vertices (2, 4), (0, 10), and (2, 2).
 
 
 
 
2 b.

triangle with vertices (5, 7), (2, 5), and (9, 1).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 23 square units.

 
1 b. 

The area is 5 square units.

 
2 a. 

The area is 2 square units.

 
2 b. 

The area is 13 square units.

 


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