Question

The length of the hypotenuse in the figure is:

[1 Mark]

Answer 1

Triangle ABC is a right angle triangle, right angled at B, so AC is the hypotenuse.
Therefore using Pythagoras' Theorem
$A{C}^2=(5-1{)}^2+(1-4{)}^2$
= 16 + 9
$A{C}^2=25$
$\therefore AC=5$
[1 Mark]