8.4-8.6 Extra Practice

Identify the Law of Sines

• Sin²x + Cos²x =1

• $\frac{\sin A}{a}=\frac{\sin B}{b}=\frac{\sin C}{c}$
  

• Sin(A)Sin(B)Sin(C) = 1

• Soh-Cah-Toa

Which of the following formulas shows the Law of Cosines?

• c² = a² + b² - 4ac + cosA
• c² = a² - b² - 2abcosC
• c² = a² + b² - 2abcosC
• (cos A)/a = (cos B)/b

Use the Law of Sines to find the length of side AB.

• 10

• 8

• 6.1

• 4.9

Use the Law of Sines to find the length of Side BC.

• 33

• 24

• 12

• 29

Find the length of side AC.

**Use Law of Sines*

• 12

• 10

• 23

• 14

What is the measure of angle A?

**Use Law of Sines**

• 58 degrees

• 61 degrees

• 78 degrees

• 74 degrees

Use Law of Cosines to find XZ

• 16.004 meters

• 544.165 meters

• 34.7 meters

• 1204.165 meters

Use Law of Cosines to find QR

• 34.7 km

• 2.2 km

• 13.74

• 31.1 km

Use the Law of Cosines to find the value of x.

• 41.7

• 51.7

• 61.7

• 71.7

Use Law of Cosines to find the missing angle

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11