4th Grade Math & You Chapter 12 Vocab

The same direction in which the hands of a clock move.

• degrees

• counterclockwise

• ray

• clockwise

An angle that measures greater than 0 degrees and less than 90 degrees.

• protractor

• degrees

• acute

• right

A unit for measuring angles and temperatures.

• clockwise

• degrees

• vertex

• right

The opposite direction in which the hands of a clock move.

• ray

• protractor

• clockwise

• counterclockwise

A part of a line. It has one end point and continues with out end in one direction.

• ray

• protractor

• clockwise

• vertex

A tool for measuring the size of an angle.

• right

• protractor

• acute

• vertex

The point where two rays or line segments meet in a two-dimensional shape.

• right

• degrees

• acute

• vertex

An angle that forms a square corner.

• right

• degrees

• acute

• vertex