What is the length of the longest side of a right-angled triangle if one side is 5cm and one is 7cm? to one decimal place Plese help I need answer quickly>"

≈ 8.6 cm

Step-by-step explanation:

The longest side of a right triangle is the hypotenuse h

Using Pythagoras' identity , then

h² = 5² + 7² = 25 + 49 = 74 ( take the square root of both sides )

h = ≈ 8.6 cm ( to 1 dec. place )

This is your amswer.

hope this helps you.

c

step-by-step explanation: