What does the math teacher use to tend his fields of geometries? A protractor, of course.

Measuring Angles in Degrees

Khan Academy. Duration_8_22

Measuring Angles Using a Protractor

Khan Academy. Duration_3_25

Copying an Angle

Construction with compass and straightedge. Duration_2_25

Constructing an Angle Bisector

Construction with a compass and straightedge. Duration_2_16

Geometry 4(A) Distinguish between undefined terms, definitions, postulates, conjectures, and theorems

Geometry 5(B) Construct congruent segments, congruent angles, a segment bisector, an angle bisector, perpendicular lines, the perpendicular bisector of a line segment, and a line parallel to a given line through a point not on a line using a compass and a straightedge

Geometry 5(C) use the constructions of congruent segments, congruent angles, angle bisectors, and perpendicular bisectors to make conjectures about geometric relationships