Law of Cosine- Math 4

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

Find QR

• 34.7 km

• 2.2 km

• 13.74

• 31.1 km

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find XZ

• 16.004 meters

• 544.165 meters

• 34.7 meters

• 1204.165 meters

Tags

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.10

Find BC

• A

• B

• C

• D

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

A triangle with two sides that measure 6 m and 8 m with an included angle of 137°.

• 17.8m²

• 14.6m²

• 16.4m²

• 12.9m²

Tags

CCSS.HSG.SRT.D.9

Find m<C

• A

• B

• C

• D

Tags

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.10

Find angle Z

• 20.145 degrees

• 71.232 degrees

• 51.055 degrees

• 57.713 degrees

Tags

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.10

What is the length of side x?

• 130 cm

• 112 cm

• 150 cm

• 105 cm

Tags

CCSS.HSG.SRT.D.11