Question

Find the length DE in the rectangle ABCD given below.​

Answer 1

Answer:

As the rule of Pythagoras theorem we can see that ∆BAD is a right angle triangle.

So,AD²+AB²=BD²

BD=√4²+8²

=√100

=10cm

Then,We know that DE=BE[The two ears of a rectangle bisect each other]

Hence,DE=BE=10/2=5cm

Hope you understand.