Area of polygons worksheet

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

1 a.

triangle with vertices (-5, 5), (0, -4), and (-10, -6).
 
 
 
 
1 b.

triangle with vertices (1, 10), (8, -2), and (-10, 7).
 
 
 
 
2 a.

triangle with vertices (7, 6), (-4, -7), and (9, 8).
 
 
 
 
2 b.

quadrilateral with vertices (-6, 5), (1, 10), (10, -2), and (-1, -7).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 50 square units.

 
1 b. 

The area is 76.5 square units.

 
2 a. 

The area is 2 square units.

 
2 b. 

The area is 143 square units.

 


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