Question

construct an angle of 90 using a pair of compasses name the angle now name the vertex and arms of the angle

Answer 1

So, this the solution.

Answer 2

Draw a horizontal line.Then draw a angle with left side of line from a point in anticlockwise direction.shift the compass niddle to the right side of horizontal line.Make cut mark on the angle drawn successive at two points at 60 degree and 120 respectively i.e automatic parameters of compass. From both point intersecting at 60&120 make a cut mark. The intersecting point of these two Will give us right angle.