An angle that measures less than 90 degrees.

A figure made up of 2 rays that share the same starting point.

The same denominator in two or more fractions. Example, and have the common denominator 4.

A whole number with more than one factor pair.

A way to write tenths, hundredths, and other decimal fractions as numerals with digits and a decimal point. The digits to the left of the decimal point show the whole-number part of the number. The digits to the right of the decimal point show the fractional part less than 1.

Examples:

written in decimal notation is 0.3.