You can easily check if two angles are equal in GeoGebra, if you know how to draw your figure.
GeoGebra Instruction 1
Algebra View and Graphics View under View in Menu. GeoGebra. Angle(<Object>)
and replace <Object> with the name of one of the two points. Repeat for the remaining point.
Algebra View, so that you can see if they’re equal or not.