FINDING ARC MEASURES ARC LENGTHS FORMULAS MULTIPLE RESPONSE

FINDING: ARC MEASURES & ARC LENGTHS FORMULAS:

MULTIPLE RESPONSE WHAT MEASUREMENTS SHOULD YOU USE TO CALCULATE CIRCUMFERENCE? Radius B. Area C. Chord length D. Diameter A.

MISSING ARC MEASURE 1 st set up the formula Input all given information � The arc length should be given since you’re solving for arc measure � Remember that you have to calculate the Circumference EXAMPLE: • Place given data in the formula • Cross Multiply • Solve for “a”

FIND THE … MISSING ARC MEASURE OF ARC “A” 80º B. 45º C. 22. 5º D. 44º A. 8 in a 3. 14 in

MISSING ARC LENGTH 1 st set up the formula Input all given information � The arc length should be given since you’re solving for arc measure � Remember that you have to calculate the Circumference EXAMPLE: • Place given data in the formula • Cross Multiply • Solve for “a”

FIND THE … MISSING ARC LENGTH OF ARC “A” 14. 40 in B. 10. 08 in C. 7. 20 in D. 20. 16 in A. a 22 in 75º

FINDING SECTOR AREA A “sector” is a piece of the pie; a slice of pizza! Book Definition: Region bounded by 2 radii and their intercepted arc of a circle.

FINDING: AREA OF A SECTOR FORMULAS:

MISSING SECTOR AREA 1 st set up the formula Input all given information � The arc measure should be given since you’re solving for sector area � Remember that you have to calculate the Area EXAMPLE: � Place given data in the formula � Cross Multiply � Solve for “a”

FIND THE … MISSING ARC AREA OF SECTOR “A” 2 A. 20 cm 2 B. 827 cm 2 C. 2598 cm 2 D. 414 cm 130º 27 cm