Trig: Right Angle Not Required

What is the area of 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.11

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 8, 8, and 8, what is the area?

• 8

• 15.58

• 27.71

• 62.91

Tags

CCSS.HSG.SRT.D.9

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

• 6

• 6.28

• 12

• 3.14159

What is the semi-perimeter?

• 1/2 of the actual perimeter

• A circular object rotated 90 degrees on its axis

• My dog's name

• The distance around a semi truck multiplied by the square root of the perimeter

If the sides of a triangle are 8, 8, and 8, what is the semi-perimeter?

• 8

• 12

• 24

• 3.14149

If the sides of a triangle are 3, 4, and 5, what is the semi-perimeter?

• 3

• 6

• 9

• 12

If the sides of a triangle are 12,5, and 2. What is the area?

• 12

• 40.65

• 19

• This triangle does not exist

Tags

CCSS.HSG.SRT.D.10

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.9

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