Question

Prove that the diagnols of a square are equal and bisect each other at right angles.
1) AC=BD
2) OA=OC AND OB=OD 3) AC IS PERPENDICULAR TO BD

I NEED THE PERFECT ANSWER PLEASE GIVE IT SOON​

Answer 1

let ABCD be a parallelogram

sum of interior angle of a parallelogram in a same line or you can say parallel to each other and in that case the sum of interior angle is 180 degree so angle A and angle b is equal to 180 degree

similarly we will take angle C and Angle B there some also will be 180 degree and we have already said that angle b is 90 degree so the c will also be 90 degree