Practice Page

Math A

Similar Polygons - Perimeter and Area 

 

Try the following:

1. Two triangles are similar.  The sides of the first triangle are 7, 9, and 11.  The smallest side of the second triangle is 21.  Find the perimeter of the second triangle.

Choose:

27
33
63
81

 

 

2. Two triangular roofs are similar.  The ratio of the corresponding sides of these roofs is 2:3.  If the altitude of the smaller roof is 6 feet, find the corresponding altitude of the larger roof.

Choose:

6
9
36
81

 

 

3. Two polygons are similar.  If the ratio of the perimeters is 7:4, find the ratio of the corresponding sides.

Choose:

7 : 4
49 : 16

 

 

4. The ratio of the perimeters of two similar triangles is 3:7.  Find the ratio of the areas.

Choose:

3 : 7
9 : 49

 

 

5. The areas of two similar polygons are in the ratio 25:81.  Find the ratio of the corresponding sides.

Choose:

5 : 9
25 : 81
625 : 6561

 

 


Caldwell