Answer:
The correct answer is option 2
45 cm
Explanation:
It is given a circle with circumference C = 180 cm
To find the length of arc ABC
From the figure we can see that the central angle of arc ABC = 90°
Therefore the arc length = (90/360) * Circumference
Arc ABC = (90/360) * 180 = (1/4) * 180 = 45
Therefore arc length = 45 cm
The correct answer is option 2