Chapter 9 Retest

solve for c

• 7
• 9
• 4
• 13

Tags

CCSS.8.G.B.7

Find the length of the missing side. 

• 20 in.
• 68 in.
• 16 in.
• 80 in.

A triangle has side lengths:
5, 8, 6.  Is this triangle a right triangle, an acute triangle, or an obtuse triangle?

• right
• acute
• obtuse

What is the length of y in this picture?

• 45
• 5√2
• 90
• 5

What is the length of x in this 45-45-90 triangle?

• 4√2
• 4
• 8
• 4√3

What is the length of y in this 45-45-90 triangle?

• 8√2
• 4√2
• 4
• 8

What are x and y in this 30-60-90 triangle?

• x = 6 y = 3√3
• x = 3√2 y = 3
• x = 3√3 y = 6
• x = 3√3 y = 3√2

Find the value of x.

• 18
• 18√3
• 36√3
• 12

Find the geometric mean for 4 and 9.

• 6
• 2√3
• 3√2
• 8

Tags

CCSS.HSA.REI.A.2

Find the value of x.

• 75

• 20

• √50

• 5√2