Question

B Match the following 5 1. Automation a. Younger Generation 2. Education b. Robot 3c. E –book 5. Harmful ​

Answer 1

1Automation - b. Robot

2. Education-3c. E –book

Answer 2

Explanation:

$\huge{\mathcal {\purple {A}\green {n}\pink {s}\blue {w}\purple{e}\green {r}}}$

Let AB=AC=a and AD=b.

△ABC is right angled at A ⇒ AB

2

+AC

2

=BC

2

⇒BC=a

2

BD=AB−AD=a−b

By angle-bisector theorem,

BD

AD

=

BC

AC

.

⇒

a−b

b

=

a

2

a

=

2

1

⇒b=

1+

2

a

=a(

2

−1)

⇒a+b=a

2

But, we know AC=a, AD=b, BC=a

2

⇒AC+AD=BC. Hence it is proved.