Here's your tools a ruler,protractor,and a pencil

If you don't know what a protractor is it is used to make angles

I'll explain what an angles is,let's start with 90 degree angle it at least is 90 degrees of course but u need to measure it examples in the pic next...

Draw the dot first that's a starting dot👍🏻

Put your protractor on top of the dot

Spot the lines and that's how you mark your point that is exactly 90 degrees

After that you wanna line those marks to the dot

There you go your 90 degree angle

Dat boi just made mlg math for youuuu Souja boi bai