Hello there!
There are 360° in a circle.
To find 3/4 of a circle, you must first find 1/4 of a circle
We need to divide 360 by 4.
360/4 = 90
Now, to find 3/4 of a circle, we must multiply 90 by 3.
90 * 3 = 270
This means that an angle that is 3/4 of a circle is 270°
I hope I helped!
Let me know if you need anything else!
~ Zoe