The Brainliest Answer!

we know that linear pair of angle is180 degrees.

angle bisector means it divides the angle into two equal angles.

so,180/2=90 degrees.

that means each angle should be 90 degree. And we  know that 90 degree is known as

right angle .hence proved.

2 5 2
plz answer my another question on factorise also..
ramya - not that way.

This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Angles ACD and DCB are a linear pair. Sum of these angles = 180 deg
ACD + DCB = 180 deg

CE is bisector of angle ACD.
CF is bisector of angle DCB.

To prove that angle ECF = 90 deg.

ECF = ECD + DCF = 1/2 ACD + 1/2 DCB
         = 1/2 { angle ACD + angle DCB ] = 1/2 180 deg = 90 deg

1 3 1