Angles and Reference Angles

tan(1020^o)

• -2

• -1/2

• 1/2

• -√3

What is the reference angle for -485^o

• 45^o

• 55^o

• -210^o

• √3

Find a coterminal angle to -1,330^o

• -250

• -150

• -1,400

• 60

Find a coterminal angle to 3π/7

• -5π/7

• 2π

• 31π/7

• 28π/7

This is what kind of angle?

• obtuse

• right

• straight

• acute

Supplementary angles always add up to

What is the vertical angle to angle 4?

• Angle 2

• Angle 6

• Angle 8

• Angle 7

Vertical angles are always

• acute

• total 180 degrees

• congruent (equal measures)

• adjacent angles

Which angle is a vertical angle to with \angle7 ?