Software to draw easily sectors with angle on it

Question

I want to draw a sector with the angle on it. I have tried several tools but didn't find any easy way of doing it.

Answer 1

You can use Geogebra, a free program that can be used to created all kinds of geometric images, including this one. First create a circle with center $C$ and point on the circle $P$. Then make an angle of $45^\circ$ from $AP$, to get $Q$ on the circle. Last, there is a function to select the circle-sector, but I don't know by heart which one.

Answer 2

GeoGebra is the gold standard!