Texas Math Models

Try “number line” or “4.5D”

Drawing an angle

reading in reverse

G4

Draw 70°: the protractor goes on the ray.030609012015018070°1 · draw one ray first2 · put the center hole on its endpoint3 · lay the ray along a zero4 · make a dot at 70 on that scale5 · join the dot to the endpointdrawing an angle is reading one in reverse

How this one works

How

draw a ray, line the protractor up on it, dot the number, join the dot.

Best when

a question asks you to draw an angle, not measure one.

The same problem, other ways