Question

find the length of an arc of the circle which subtends an angle of 180* at the centre ,if the radius of the cricle is 15 cm.

Answer 1

Answer:

So you need to know degrees into radians conversion for this

180°= 2π

and as we know the formula of circles

lenght of arc÷ radius in metres= angle subtended in radians

Step-by-step explanation:

So

length of arc÷15= 2π

length of arc= 2π×15=30π

you can also do this by considering it as semicircle