Vocab 21

Front

Useful minerals and materials taken from the Earth.

Back

Natural Resource

Front

A resource that is quickly replenished by nature (e.g., air, water, plants, animals).

Back

Renewable Resource

Front

A resource that cannot be quickly replaced (e.g., oil, coal, natural gas).

Back

Nonrenewable Resource

Front

Angle < 90°

Back

Acute Angle

Front

Angle measuring 90 degrees.

Back

Right Angle

Front

Angle > 90° and < 180°

Back

Obtuse Angle

Front

Angle measuring 180 degrees.

Back

Straight Angle

Front

An imaginary line dividing a figure into two congruent mirror-image halves.

Back

Line of Symmetry

Front

Instrument for measuring angles, flat semicircle marked with degrees.

Back

Protractor

Front

Measure for angles, 360 in a rotation, symbol °.

Back

Degrees