Area of polygons worksheet

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

1 a.

triangle with vertices (-4, 1), (10, 0), and (-2, -1).
 
 
 
 
1 b.

quadrilateral with vertices (-9, 1), (6, 2), (5, 0), and (-1, -3).
 
 
 
 
2 a.

triangle with vertices (8, -3), (2, 5), and (6, 2).
 
 
 
 
2 b.

quadrilateral with vertices (-4, 1), (7, 2), (10, -7), and (-2, -10).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 13 square units.

 
1 b. 

The area is 38.5 square units.

 
2 a. 

The area is 7 square units.

 
2 b. 

The area is 120 square units.

 


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