The circumference of the circle E is :
C = 2 r π
C = 2 * 40 π = 80 π cm.
Also 324° / 360° = 0.9
m Arc (ABC ) = 0.9 * 80 π = 72 π cm
There is also formula for calculating the measure of an arc:
m Arc = r π α / 180°
m Arc = 40 π * 324 / 180 = 40π * 1.8 = 72 π
Now we have to find the exact length ( π ≈ 3.14 )
m Arc ( ABC ) = 72 * 3.14 = 226.08 cm
Answer:
26π
Step-by-step explanation:
26π because the formula is πd=circumference
7 because 4+2=6 and 1/2+1/2=1 so 6+1=7