Question

ABC is a triangle, right angled at C.If AB =25cm and AC = 7cm, find BC (By
using Pythagoras theorem)

Answer 1

Answer:

we know ac²=ab²+bc²

so if right angled c.

ab²=ac²+bc²

25²=7²+bc²

625-49=bc²

bc²= 576

bc=24 .

Answer 2

Answer:

BC= 24

Step-by-step explanation:

According to Pythagoras Theorem:- If we let c be the length of the hypotenuse and a and b be the lengths of the other two sides, the theorem can be expressed as the equation: a²+ b² = c²

Hence in this case

AC² + BC² = AB² (because hypotenuse is always the biggest side, therefore 'AB' is hypotenuse and 'AC' & 'BC' are other two sides)

So,

7² + BC² = 25²

BC² = 625 - 49

BC = (576)½

BC = 24

Hope it will help you...