Law of Cosines

What is the value of x?

• 15.9

• 21.8

• 19.2

• 521.1

What is the value of x?

• 19.1

• 21.3

• 7.7

• 10.8

Maple Street, Oak Drive, and West Avenue intersect to form a triangle. The angle formed by Maple Street and Oak Drive is 79^o. If the Maple Street section of the triangle is 390 feet and the Oak Drive section is 250 feet, find the length of the West Ave section.

• 42 feet

• 78 feet

• 600.5 feet

• 421.2 feet

What is the value of x?

• 44.5^o

• 52.8^o

• 67.9^o

• 82.1^o

What is the value of x?

• ^98.6o

• 118.5^o

• 121.4^o

• 125.9^o

Find BC

• A
• B
• C
• D

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

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 m<C

• A
• B
• C
• D

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find angle Z

• 20.145 degrees

• 71.232 degrees

• 51.055 degrees

• 57.713 degrees

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

If three sides of a triangle are given, the Law of ____ is used to solve the triangle.

• Cosines
• Sines
• Tangent
• Cosecents

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11