Area of polygons worksheet

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

1 a.

triangle with vertices (-4, 7), (-4, -3), and (5, 7).
 
 
 
 
1 b.

trapezoid with vertices (-8, 9), (3, 2), (3, 0), and (-8, -2).
 
 
 
 
2 a.

triangle with vertices (-1, 3), (-1, 10), and (-5, 3).
 
 
 
 
2 b.

triangle with vertices (1, 6), (1, -9), and (2, 6).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 45 square units.

 
1 b. 

The area is 71.5 square units.

 
2 a. 

The area is 14 square units.

 
2 b. 

The area is 7.5 square units.

 


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