Question

ABC is a right angled triangle

AC=6cm
AB=20cm
Calculate length of BC
Give answer to 1 decimal place

Answer 1

19.1 cm

I don't have a picture so I hope this is what you mean/

Explanation:

AB²-AC²=BC²

20²-6²=BC²

400-36=BC²

364=BC²

√364=√BC²

BC≈19.1

Answer 2

19.1cm

Explanation:

AB=20

AC=6

BC=?

So,by Pythagoras Theorem:-

AC2=AB2+BC2

Therefore:-

AB2-AC2=BC2

400-36=BC2

√364=BC2

19.1=BC2