4.4 reference angles

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

What is the reference angle for -310⁰?

• 50⁰

• -50⁰

• 20⁰

• 40⁰

What is the reference angle for 275°?

• 85°

• 95°

• -85°

• -95°

What is the reference angle?

• 163

• 73

• 27

• 107

What is the reference angle?

• 43

• -43

• 47

• -47

What is the reference angle?

• 112

• 68

• 158

• 248

What is the reference angle?

• 48

• 138

• 132

• 42

Mathematical Equivalence

ON

What is the reference angle for 240 degrees?

• 60 degrees
• 30 degrees
• 45 degrees
• 210 degrees

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1
• sqt2/2
• sqt3/2
• 1/2