Law of sines and cosines

Find the length of Side BC.

• 33

• 24

• 12

• 29

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find the length of side AB.

• 10

• 8

• 6.1

• 4.9

Tags

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.10

Find the length of side AC.

• 12

• 10

• 23

• 14

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Which law would you use to find angle A?

• Law of Cosines

• Law of right triangles

• Law of Sines

• Pythagorean Theorem

Which Law would you use to solve for Angle B?

• Law of the Jungle

• Law of Cosines

• Law of the Gravity

• Law of Sines

Which Law would you use?

• Law of Sines
• Law of Cosines
• Law of the Jungle
• Law of Gravity

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 Cosines to find the value of x.  (Level 1)

• 41.7
• 51.7
• 61.7
• 71.7

Which Law would you use?

• Law of Sines
• Law of Cosines
• Law of the Jungle
• Law of Gravity

What is the measure of angle A?

• 50 degrees
• 60 degrees
• 78 degrees
• 74 degrees