Question

If ABCD is an A4 sheet and BCPO is the square, prove that △OCD is an isosceles triangle. And find the angles marked as 1 to 8 without using a protractor.​

Answer 1

Answer:

Step-by-step explanation:

Step-by-step explanation:

Given:If ABCD is an A4 sheet and BCPO is the square.

To find: Prove that △OCD is an isosceles triangle. And find the angles marked as 1 to 8 without using a protractor.

Solution:

As to draw largest square in A4 sheet,Sheet should be fold breadth wise.

BCPO is a square,its diagonal OC =CD

Thus,

In triangle OCD ; OC= CD

So,OCD is an isosceles triangle.

We know that angle opposite to equal sides are equal.

So,

OC is diagonal,it bisect the angle C

By the same way

In Silver Rectangle AOPD,all angles are 90°

Line DP||AO

So,

thus,

Thus

Hope it helps you.