Finding Missing Sides and Angles with Trig

Find the measure of the indicated angle (?) round to the nearest tenth.

• 9.4

• 55.2

• 20.15

• 19.4

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CCSS.HSG.SRT.C.8

Find x.

• 12.8

• 77.2

• 12.5

• 77.5

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CCSS.HSG.SRT.C.8

Find the ratio for sin C. 
Note: <C is the measured angle to help determine the opposite and adjascent sides.

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CCSS.HSG.SRT.C.6

Find the ratio for cos A.

Note: A is the measured angle

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CCSS.HSG.SRT.C.6

What can you find with trig ratios (sin, cos, tan)?

• Missing sides

• missing angles

• area of a triangle

• missing sides, angles and area of a triangle

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CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find the length of the missing side. Round your answer to the nearest 10th.

Mathematical Equivalence

OFF

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CCSS.HSG.SRT.C.8

What can you find with trig ratios?

• Missing sides

• missing angles

• area of a triangle

• missing sides, angles and area of a triangle

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CCSS.HSG.SRT.C.8

A skateboarding ramp is 12 inches high and rises at an angle of 17°. How long is the base of the ramp to the nearest tenth?

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CCSS.HSG.SRT.C.8

What is the correct equation?

​ (a)   = ​ (b)   /​ ​ (c)  

• Sin(40)

• w

• 28

• Cos (40)

• tan 40

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CCSS.HSG.SRT.C.6

Solve for the missing angle

• 32°

• 44°

• 61°

• 50°

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CCSS.HSG.SRT.C.8