Area of polygons worksheet

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

1 a.

triangle with vertices (30, 48), (30, 7), and (-36, 48).
 
 
 
 
1 b.

triangle with vertices (-18, -35), (-18, -38), and (-31, -35).
 
 
 
 
2 a.

trapezoid with vertices (-21, 43), (12, 43), (12, -45), and (-5, -45).
 
 
 
 
2 b.

triangle with vertices (-27, 27), (-27, 40), and (-29, 27).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 1353 square units.

 
1 b. 

The area is 19.5 square units.

 
2 a. 

The area is 2200 square units.

 
2 b. 

The area is 13 square units.

 


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