10.5 G

Find Area of ABC

• 223.6 units²

• 73.1 units²

• 52.7 units²

• 3.3 units²

Tags

CCSS.HSG.SRT.D.9

Find the area of  $\Delta ABC$  
if a = 9cm, b = 11cm, c = 16cm

• 52.1 sq cm

• 89.5 sq cm

• 47.6 sq cm

• 15.2 sq cm

Tags

CCSS.HSG.SRT.D.9

What is the area of a triangle with two sides that measure 5 cm and 8 cm with an included angle of 39°?

• 15.9cm²

• 12.6cm²

• 15.3cm²

• 16.2cm²

Tags

CCSS.HSG.SRT.D.9

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

If the sides of a triangle are 3, 4, and 5, what is the area?

• 6

• 6.28

• 12

• 3.14159

Tags

CCSS.6.G.A.1

Which formula would you use?

• Law of Sines

• Law of Cosines

• A=.5bcsinA

• Herons

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Which formula would you use?

• Law of Sines

• Law of Cosines

• Herons

• A=.5acsinB

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

Which area formula works for this triangle?

• ½(5)(7)cos(49⁰)

• (5)(7)sin(49⁰)

• ½(5)(7)sin(49⁰)

• all of these

Tags

CCSS.HSG.SRT.D.9