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BELL RINGER 60 o 2 in. 4 in. Find the arc length and area of the sector of the circles: 1. 2. 3. What effect does doubling the radius have on the arc length.

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Presentation on theme: "BELL RINGER 60 o 2 in. 4 in. Find the arc length and area of the sector of the circles: 1. 2. 3. What effect does doubling the radius have on the arc length."— Presentation transcript:

1 BELL RINGER 60 o 2 in. 4 in. Find the arc length and area of the sector of the circles: 1. 2. 3. What effect does doubling the radius have on the arc length and sector area?

2 RADIAN MEASURE MONDAY, DECEMBER 7, 2015

3 WHAT IS A RADIAN??? Discovering radians activity… You need: 1)A paper plate 2)Pipe Cleaner 3)Ruler and protractor 4)Scissors

4 NOTES

5 MORE EXAMPLES

6 PARTNER WORK Work with your learning partner to find the angles in degrees and radians.

7 UNIT CIRCLE Now that we can convert from degrees to radians, let’s fill in a Unit Circle with both.

8 HOMEWORK Think Radian Worksheet

9 EXIT TICKET 1) What is in the denominator when a 30 o angle (and those “like” it) is converted to radians? 2) What is in the denominator when a 45 o angle (and those “like” it) is converted to radians? 3) What is in the denominator when a 60 o angle (and those “like” it) is converted to radians?

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