There is a right-angle triangle with hypothenus H = 5 cm and side A = 3 cm. Find the length of the third side B using Pythagoras' Theorem.

Pythagoras' theroem states that on a right-angle triangle, the square of the longest side (hypothenus) is equal to the sum of the squares of the other two sides.

Therefore, H= A2 + B2 

52 = 32 + B2

25 = 9 + B2

B2 = 25 - 9

B = Square root(16)

B = 4 cm

AV
Answered by Ashwin V. Maths tutor

2842 Views

See similar Maths 13 Plus tutors

Related Maths 13 Plus answers

All answers ▸

Solve the following simultaneous equations: equation A 2y+3x=14 equation B y+2x=8


How do I simplify multiplying potencies with the same base?


The area of a circle is 16π cm squared. Find the diameter of the circle.


Expand and simplify (a+b)^2


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences