Warm up!Find the lengths of the missing

sides.

6

60

And before we get to the learnin’, any

questions from the homework?

The Wørd

Section 4.1Radian and Degree

Measures

I can’t wait for

tomorrow…Angles in Standard Position

y

x

Initial Edge

Terminal Edge

Not only because I get better looking every

day…Coterminal angles have the same terminal edge. y

x58

…but because it’s game day!

y

x

Drawr the given angle in standard position. Find a

positive and negative coterminal angle.150

The other days of the

week…

y

x

Drawr the given angle in standard position. Find a

positive and negative coterminal angle.45

…are so blah.

y

x

Drawr the given angle in standard position. Find a

positive and negative coterminal angle.230

It’s not like game day…

Reference Angles

y

x

210

A reference angle is the ACUTE angle

formed by the terminal edge and X-AXIS. '

…where there’s a feeling of

awesomeness.Find the reference angle for the given angle in standard position.y

x

162

The other days of the week…

Find the reference angle for the given angle in standard position.y

x

100

…are like day old pizza…Find the reference angle for the

given angle in standard position.

y

x

485

…or warm, flat soda…

RadiansCircumference

…scuzzy teeth…

Convert the given angle from radians to degrees or vice verse.

195

…a bad haircut…Convert the given angle from

radians to degrees or vice verse.

270

Convert the given angle from radians to degrees or vice verse.

35

…that feeling just before you throw

up…

Convert the given angle from radians to degrees or vice verse.

12

…when you realize someone’s not waving at

you…

Convert the given angle from radians to degrees or vice verse.

3

5

…cleaning your house and finding a bowl of

dried milk…

Convert the given angle from radians to degrees or vice verse.

11

6

…or an awkward

family reunion.

y

x

Drawr the given angle in standard position. Find a

positive and negative coterminal angle.

3

I’d liken game days

to…

…getting your first

job…Angles in Standard Position (for radians)

y

x

y

x

Drawr the given angle in standard position. Find a

positive and negative coterminal angle.5

6

…finding

money…

y

x

Drawr the given angle in standard position. Find a

positive and negative coterminal angle.14

3

…fresh-baked chocolate chip

cookies…

Find the reference angle for the given angle in standard position.y

x

5

4

…Christmas morning…

Find the reference angle for the given angle in standard position.y

x

3

…getting your first

car…

…can you tell I don’t like the other 6 days of the

week?Find the reference angle for the given angle in standard position.y

x

7

6

Mr. Wu is teasing the lions at the zoo. From the railing above the

pen, Mr. Wu shoots his laser pointer at an angle of depression of 40˚ to hit the alpha male. He

then points his laser at an angle of depression 32˚ to hit his cub that’s 10 ft farther away. How high up is

Mr. Wu?

4.1 from the HW packet!And your homework!