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Unit 6 Test for Chapter 9

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Question 1
1.

Given side lengths of 6, 8, and 12 classify the triangle.
Note: a2 + b2 = c2

Question 2
2.

Find the exact length of side BC.


Note: a2 + b2 = c2

Question 3
3.

Find the measure of angle A. Round to the nearest tenth.


Note: Use your calculator for sin-1, cos-1, or tan-1 .

Question 4
4.

Which trigonometric ratio would be used to solve for the value of side q?


Note: SOH-CAH-TOA

Question 5
5.

Find the measure of the unknown angle.


Note: The sum of the angles inside the triangle.

Question 6
6.

What is the trigonometric ratio for sin D?

Note: SOH-CAH-TOA

Question 7
7.

Find the exact value of segment IR.


Note: Label the S, L, and H sides before you choose the formula.

Question 8
8.

1. Find the exact value of segment TI.


Note: Label the S, L, and H sides before you choose the formula.

Question 9
9.

A right triangle has a base of 12 m and a height of 5m, find the length of the hypotenuse.
Note: a2 + b2 = c2

Question 10
10.

In the diagram, △ABC is similar to △DEF. The area of △ABC is 36 cm2, find the area of △DEF.

Note: Similar triangles have a scale factor. Their perimeters are proportional to the scale factor. Their areas are proportional to the square of the scale factor.

Question 11
11.

A sonar operator on a ship detects a submarine at a distance of 500 meters and an angle of depression of 40˚. How deep is the submarine to the nearest meter?


Hint: SOH-CAH-TOA

Question 12
12.

The sun casts a shadow of a man on the ground that is 5.45 feet long. The angle of elevation is 50˚.
What is the height of the man? Round your answers to the nearest hundredth.
Hint: SOH-CAH-TOA

Question 13
13.

You lean a 20 foot ladder against a wall. The base of the ladder is 4 feet from the wall. Safety
guidelines require the angle of elevation of the ladder from the ground to be between 70⁰ and 75⁰.
Does the angle 𝜃 meet the safety guideline? Explain your answer.

Hint: SOH-CAH-TOA

Question 14
14.

Given the diagonal of the square is 10 cm. What is the exact length of each side a?


Note: Label your the sides with L and H before choosing a formula.

Question 15
15.

What is the perimeter of the square to the nearest cm?

Note: Use your answer from problem 14 to help you.

Question 16
16.

What is the area of the square to the nearest square inch?


Note: Use your answer from problem 14 to help you.