Angles – protractor and midpoint

MathematicsPlane GeometryAges 11–12

Two rays Ox and Oy pivot around vertex O to form angle xOy; a semicircular protractor lines up with ray Ox so you can read the measure. The simulation classifies the angle as acute, right, obtuse or straight from its measure, and draws segment AB joining a point on each ray together with its midpoint M, where MA = MB.