Side Length of Triangles

The triangles shown are similar. Find the length of side EF.

• 3

• 12

• 15

• 18

If two side lengths of a triangle are 30 cm and 50 cm, what is a possible length of the third side?

• 70 cm

• 80 cm

• 100 cm

Can the side lengths of 3 ft, 7 ft, and 9 ft create a triangle? Explain.

• No, the shape won't close.

• Yes, the two shorter sides add up to be larger than the third side.

• There is not enough information.

The triangles shown are similar. Which side corresponds with side BC?

• AB

• DE

• EF

• CA

A triangle with no congruent sides

is called a(n) ...

• Isosceles Triangle

• Scalene Triangle

• Equilateral Triangle

• None of the Above

A triangle with two congruent sides

is called a(n) ...

• Isosceles Triangle

• Scalene Triangle

• Equilateral Triangle

• None of the Above

How long is side x if the triangles are similar??

• 2 ft

• 3 ft

• 4 ft

• 6 ft

What is the length of XY?

• 15

• 25

• 30

• 40

Determine whether the triangles are similar by AA~, SSS~, SAS~, or not similar.

• AA

• SSS

• SAS

• not similar

What is the ratio of the side lengths?

• 2.5

• 1.5

• 2

• 1.25