Question

ABC is a right angled at B AB=4cm and AC=5cm then BC=?

Answer 1

Answer is 3cm

Step-by-step explanation:

In a right angle triangle ABC,

AB=4cm,AC=5cm

So,By Pythagoras theorem,

AC² = AB²+BC²

5²=4²+BC²

25=16+BC²

25-16=BC²

now,BC²=9

therefore,BC=3cm