Unit 8 Study Guide

Find the length of the missing side. 

• 17 cm
• 22 cm
• 15 cm
• 13 cm

You need a ladder that will reach up a 25 foot tall house when placed 10 feet away from the house. How tall does the ladder need to be?

• 25 feet
• 26 feet
• 27 feet
• 28 feet

State if the three sides lengths form an acute, obtuse, or right triangle:
7 in, 11 in, 13 in

• acute
• obtuse
• right

Do the segment lengths 15, 9 and, 12 form a right triangle?

• Yes
• No

3,4,5

• yes, it is a right triangle.

• no, it is not a right triangle.

What is the length of y in this picture?

• 45
• 5√2
• 90
• 5

Which is the length of v in this 30-60-90 triangle?

• $4\sqrt{3}$

• 4

• 8

• $4\sqrt{2}$

In this 30-60-90 triangle, what is the length of the long leg?

• 6√2

• 3√3

• 12

• 6√3

What is a in this 30-60-90 triangle?

• a = 7√3

• a = 7√2

• a = 14

• a = 14√3

I have been given a hypotenuse in this 45-45-90 triangle.  How do I find the length of a leg of the triangle?

• Multiply by √2
• Divide by √2
• It's the same length as the hypotenuse.
• Divide by 2