Applying concepts in similarity to perimeter

What is the ratio of the similar figures, big to little?

• 2:1

• 3:1

• 5:3

• 2:3

The lengths of the sides of a triangle are 5, 12, and 13.  What is the length of the longest side of a similar triangle whose perimeter is 90?

• 13
• 15
• 36
• 39

1.  Given triangle ABC ~ triangle DEF such that (AB)/(DE) = 3/2.  Which statement is not true?

• (BC)/(EF) = 3/2
• (BA)/(ED) = 3/2
• The ratio of the areas of ABC and DEF is 3:2
• The ratio of the perimeters of ABC and DEF is 3:2

What happens to the perimeter of a square if the sides are    halved?

• doubles
• halved
• quadrupled
• forthed

If the ratio of the lengths of corresponding sides of two similar triangles is 2:3, what is the ratio of their perimeters?

• 4:5

• 2:3

• 3:4

• 1:2

Triangle ABC is similar to triangle DEF with the side lengths of triangle ABC being 5 times the side lengths of triangle DEF. What characteristic of the two triangles is the same?

• the areas

• the perimeters

• the angles

• the side lengths

Rectangle DEFG is similar to rectangle JKLM. Rectangle DEFG has a length of 5 units and a perimeter of 16 units. Rectangle JKLM has a length of 10 units. What is the perimeter of rectangle JKLM?

• 8 u

• 32 u

• 20 u

• 64 u

The sides of a triangle are 9, 12 and 15 inches. Find the longest side of a similar triangle whose perimeter is 24 inches

• 6

• 8

• 10

• 12

Find the missing side of the large triangle, then, find the PERIMETER of the large triangle.

• 24

• 36

• 12

• 34

If the ratio of corresponding sides in two similar polygons is 5:6, and one side of the first polygon is 15 units, what is the length of the corresponding side in the second polygon?

• 18

• 20

• 30

• 12