ABC is a triangle,right-angled at C. If AB=25cm and AC=7cm,find BC.

Answer:

The triangle ABC is a right angle triangle and is right angled at C.

Then AB will be the hypotenuse which is equal to 25 cm and AC will be the perpendicular which is equal to 7 cm and the Base will be BC = ?

So as per the pythagoras theorom:

Hypotenuse² = Base² + Perpendicular².

Base² = Hypotenuse² - Perpendicular²

Base =√Hypotenuse²- Perpendicular²

Base =√25² - 7² =√625 - 49 =√576 = 24 cm.

Ans: 24 cm.