Law of Sines and Cosines and Area

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of Tangents

• Law of Exponents

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Which Law would you use?

• Law of Sines

• Law of Cosines

• Law of the Jungle

• Law of Exponents

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

To solve the triangle shown, you would start with which formula?

• Law of Cosines

• Law of Sines

• Heron's Formula

• Triangle sum theorem

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Choose which law you need to solve the problem (DO NOT SOLVE):

• Law of Sines

• Law of Cosines

• Both

• Neither

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

• Two Triangles

• One Triangle

• None

Tags

CCSS.7.G.A.2

• Two Triangles

• One Triangle

• None

Tags

CCSS.7.G.A.2

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

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

4. Name the smallest angle in this triangle.

• ∠A

• ∠B

• ∠C

Tags

CCSS.HSG.CO.C.10

Use the Law of Sines to solve for BC

• 33
• 24
• 12
• 29

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

What is the measure of angle A?

• 58 degrees
• 61 degrees
• 78 degrees
• 74 degrees

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11