Area of polygons worksheet

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

1 a.

triangle with vertices (3, 4), (3, 8), and (-1, 4).
 
 
 
 
1 b.

triangle with vertices (-1, 0), (-1, 6), and (4, 0).
 
 
 
 
2 a.

triangle with vertices (4, -3), (4, 10), and (3, -3).
 
 
 
 
2 b.

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

Answer Key

1 a. 

The area is 8 square units.

 
1 b. 

The area is 15 square units.

 
2 a. 

The area is 6.5 square units.

 
2 b. 

The area is 35 square units.

 


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