Special Right Triangle Precalculus Review

Which side is the opposite?

• AB

• BC

• CA

Answer explanation

The opposite is the side opposite from the reference angle, which is in this case the theta.

Tags

CCSS.HSG.SRT.C.6

Which side is the adjacent?

• AB

• BC

• CA

Answer explanation

The adjacent is the side next to the reference angle, which is in this case the theta.

Tags

CCSS.HSG.SRT.C.6

This is a 30, 60, 90 degree triangle. Which side would be marked with an L?

• AB

• BC

• CA

Answer explanation

L can be replaced with any variable.

Tags

CCSS.HSG.CO.C.10

This is a 30, 60, 90 degree triangle. Which side would be marked with a 2L?

• AB

• BC

• CA

Answer explanation

L can be replaced with any variable.

Tags

CCSS.HSG.CO.C.10

Match the special right triangle relationships of 30 degrees to their trigonometric function values of the special angles.

• cosθ

• tanθ

• sinθ

Answer explanation

This is something you will really need to memorize!

Tags

CCSS.HSG.SRT.C.7

Match the special right triangle relationships of 45 degrees to their trigonometric function values of the special angles.

• cosθ

• tanθ

• 1

• sinθ

Answer explanation

This is something you'll really need to memorize!

Tags

CCSS.HSG.SRT.C.7

Match the special right triangle relationships of 60 degrees to their trigonometric function values of the special angles.

• cosθ

• sinθ

• tanθ

Answer explanation

This is something you will really need to memorize!

Tags

CCSS.HSG.SRT.C.7

Which trigonometric function is the opposite over the hypotenuse?

• Tangent

• Sine

• Cosine

• Secant

Answer explanation

Sine is written as sin(x).

Tags

CCSS.HSG.SRT.C.6

Which trigonometric function is the adjacent over the hypotenuse?

• Tangent

• Sine

• Cosine

• Secant

Answer explanation

Cosine is written as cos(x).

Tags

CCSS.HSG.SRT.C.6

What is the length of x in this 45-45-90 triangle?

• 4√2

• 4

• 8

• 4√3

Tags

CCSS.8.G.B.8