Question

If two sides of a right angled triangle are 20cm and 21cm, then hypotenuse = ______cm

Answer 1

Answer:

hypotenuse = 29.68cm

Step-by-step explanation:

Let Triangle ABC is a right angle triangle.

AB= 20cm, BC = 21cm and AC = ?

By Pythagoras theorem

(AC)^2 = (AB)^2 + (BC)^2

(AC)^2 = (20)^2 + (21)^2

(AC)^2 = 400 + 441

(AC)^2 = 841

AC = 29.68 (Taking square root)

Therefore, hypotenuse is 29.68cm