Construction 90* and 45*

In this ill show you how to construct an angle 90* and 45*

A paper ,scale, pen, compass,pencil

Draw a base of any length B and C

With compass on one end (B) Draw an arc of any radius(usually not much big arc)

With same radius of the previous arc draw another arc { Compass on the first arc end on the base And With same radius} Draw another arc {Compass on the previous arc And with Same radius}

With Compass points on the last two arcs Up above Like that bothe the arcs above bisects each other

Join the lines to the arcs bisected and there you go 90* JOIN B and A

To draw am angle bisector from the first arc drawn at B ,draw an arc

And from the line AB cuted by the first arc in the second pic draw an arc which bisects the last one

Join B to D and you got an angle bisector or a 45*