Area of polygons worksheet

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

1 a.

triangle with vertices (4, 2), (1, 9), and (2, 4).
 
 
 
 
1 b.

quadrilateral with vertices (2, 9), (8, 7), (9, 3), and (0, 2).
 
 
 
 
2 a.

quadrilateral with vertices (3, 8), (9, 5), (5, 1), and (4, 3).
 
 
 
 
2 b.

triangle with vertices (10, 7), (9, 10), and (9, 1).
 
 
 
 
Page 2

Answer Key

1 a. 

The area is 4 square units.

 
1 b. 

The area is 41.5 square units.

 
2 a. 

The area is 19.5 square units.

 
2 b. 

The area is 4.5 square units.

 


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