To calculate the length of a side on a right-angled triangle when you know the sizes of the other two, you need to use Pythagoras' Theorem.
Pythagoras' Theorem says that, in a right angled triangle:
The square of the hypotenuse is equal to the sum of the squares on the other two sides.
We can write this more simply as :
Use Pythagoras' Theorem to calculate the length of the hypotenuse. Give your answer to 2 decimal places.
Write the equation
Square the lengths you know
Find the square root
Calculate the length of side
(Give your answer to 2 decimal places)
Calculate the length of the side marked .
Give your answer to 2 decimal places.
Calculate the length of side a.
Give your answer to 2 decimal places