5732 Shares

Topic: Math homework calculator
July 17, 2019 / By Cristen
Question: Okay guys, year nine maths, lets do this! Question: A square has diagonals that are 20cm long. a) remembering that the diagonals of a square bisect each other at right angles, find the area of the square. b) Calculate the length of the sides of the square from the area you found, correct to two decimal places. Please show working out and you probably need a calculator :) Thank you sooo much!!!!!!!!!!!! :)) xx

Bettie | 7 days ago
Okay, so if the diagonal is 20 cm, then if you drew 2 diagonals, you would get 4 triangles right? So each side of the triangles are 10 cm. So if you use Pythagorean theorem, 10 squared plus 10 squared equals x squared, or 200 = x squared and then find the square root of 200 which equals 14.14. This is also the length of the sides of the square. Area of a square is length squared, which equals 200, remember? So I'm not sure if this is the way you are taught to do it, but that's one way.
👍 122 | 👎 7

We found more questions related to the topic: Math homework calculator