Law of Cosines

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

Name the smallest angle in this triangle.

• ∠A

• ∠B

• ∠C

• 5

Tags

CCSS.HSG.CO.C.10

Find XZ

• 16.004 meters
• 544.165 meters
• 34.7 meters
• 1204.165 meters

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 the missing side.

• 15.9 in.

• 22.8 in.

• 19.2 in.

• 521.1 in.

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Find angle Z

• 20.15°

• 71.23°

• 51.06°

• 57.71°

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

 $m\angle H=$  

•  $44.1\degree$  

•  $44.6\degree$  

•  $45.2$  

•  $45.6\degree$  

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

 $m\angle G=$  

•  $74.3\degree$  

•  $76.1\degree$  

•  $76.9\degree$  

•  $77.5\degree$  

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Solve the triangle

• b=2.95 , A=28.7 , C=106.3
• b= 2.95, A= 30.6, C=108.43
• b=0.67 , A=28.7 , C=105.78
• b=4.95 , A= 21, C=106

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Solve the Triangle
a=38, b= 31, c= 35
Find A, B and C

• A= 43°, B= 47°, C= 90°
• A= 70°, B= 50.1°, C= 59.9°
• A= 50.1°, B= 70°, C= 59.9°
• A= 60°, B= 70°, C= 50°

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11