Area of polygons worksheet

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

1 a.

triangle with vertices (3, 8), (9, 1), and (0, 8).
 
 
 
 
1 b.

triangle with vertices (5, 9), (10, 0), and (4, 6).
 
 
 
 
2 a.

triangle with vertices (5, 0), (9, 2), and (8, 3).
 
 
 
 
2 b.

quadrilateral with vertices (0, 5), (8, 10), (6, 3), and (3, 4).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 10.5 square units.

 
1 b. 

The area is 12 square units.

 
2 a. 

The area is 3 square units.

 
2 b. 

The area is 23 square units.

 


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