## Measures and Measurement Terms

**Acute angle:**An angle that measures between 0º and 90º.

**Angle:**The measure of the space between two straight lines that extend from a common point.

**Area:**The size of space a surface takes up.

**Capacity:**The amount a container can hold.

**The distance around the outer edge of a circle.**

Circumference:

Circumference:

**Complementary angles:**Two angles whose sum is 90°.

**Degree:**A unit for measuring the size of angles.

**Dimensions:**The lengths of the sides of a shape. Refers to length, breadth and height.

**Interval:**

• The distance between two points.

• The amount of time that has passed between two events

**Mass:**A measure of the amount of matter in an object.

**Minute:**A unit of time. There are 60 minutes in one hour. There are 60 seconds in one minute.

**Obtuse angle:**An angle that is greater than 90° and less than 180°.

**Opposite angles:**Angles that are vertically opposite.

**Perimeter:**The distance around the boundary of a shape.

**Reflex angle:**An angle that is greater than 180° but less than 360°.

**Right angle:**An angle which measures 90º.

**Straight angle:**An angle which measures 180º.

**Supplementary angles:**Two angles whose sum is 180°.

**Total surface area:**The total area of all the faces (and curved surfaces) of a solid figure.

**Volume:**The amount of space occupied by a 3-dimensional object.

**Year:**A unit of time. There are 365 days in one year. There are 12 months in one year.

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