Question

ABC is a triangle,right angled at C . if AB = 5cm find BC ​

Answer 1

Answer:

Vector Addition

REF.Image

Given , ΔABC is right angled at C.

AC=5cm

BC=12cm

AB=?

Using Pythagoras theorem.

REF.Image

c

2

=a

2

+b

2

c=

a

2

+b

2

so in ΔABC

AB=

(AC)

2

+(CB)

2

AB=

(5)

2

+(12)

2

AB=

25+144

AB=

169

AB=13cm