Question

10.
If A ABC is an isosceles triangle and <B = 90°, then show that
ACsquare = 2 AB?​

Answer 1

Step-by-step explanation:

according to question <B = 90

therefore ABC is an isosceles right triangle

so we know that <A =< C ( base angles are equal )

and side AB = BC ( opposite sides ) .......(1)

now we know that in right angled triangle

AB square + BC square = AC square

now put ......(1) in this

AB square + AB square = AC square

2 AB square = AC square

hence it is proved .

Answer 2

Step-by-step explanation:

by Pythagorean theorem it will be solved