Question

The total plane angle subtended by a circle at its centre is

Answer 1

hi friends

The total plane angle subtended by a circle at its center is equal to 360 degrees
convert 360 degrees to radians 
360 degree (pi/180) 
= 2pi radians 

thankyou

Answer 2

Answer:2 pi

Explanation:total angle is 360 degrees

I pi = 180 degrees

So 360 degrees = 2 pi

Hope it helps