Area of polygons worksheet

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

1 a.

triangle with vertices (-42, -34), (-42, 46), and (21, -34).
 
 
1 b.

trapezoid with vertices (-47, 10), (19, 19), (19, -30), and (-47, -26).
 
 
2 a.

triangle with vertices (-14, -6), (-14, -37), and (-37, -6).
 
 
2 b.

triangle with vertices (-39, -2), (-39, 28), and (-11, -2).
 
 
Page 2

Answer Key

1 a. 

The area is 2520 square units.

 
1 b. 

The area is 2805 square units.

 
2 a. 

The area is 356.5 square units.

 
2 b. 

The area is 420 square units.

 


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