Mathematics

An acute angle is one that is smaller than 90 degrees. A 90 degree angle is a "normal" corner, like you find inside most houses and the corners of a piece of paper. Acute angles can also be described as sharp or pointy. An angle larger than 90 degrees is called obtuse.

extension Binary describes something made of two different things, usually opposites. For example, a question with only yes or no answers is binary.

In computers, binary is a system that uses only two numbers: 0 and 1. Computers use these numbers to store information and perform tasks.

You can convert between decimal and binary numbers with the app above.

extension Decimal means a number system based on multiples of ten. It can also describe numbers with a whole part and a fractional part separated by a decimal point. For example, $2.75 is a decimal number that means two dollars and seventy-five cents.

A number system based on 2 rather than 10 is binary. You can convert between decimal and binary in the app above.

Two things are equal when there are no difference in the amounts of each thing. For example, two glasses each with equal amounts of wine in them.

An obtuse angle is one that is larger than 90 degrees. A 90 degree angle is a "normal" corner, like you find inside most houses and the corners of a piece of paper. An angle smaller than 90 degrees is called acute.

Two lines are parallel if they are next to each other and are always the same distance apart. There are many parallel lines in buildings. The vertical lines the bricks make in the right side of the picture are parallel.

extension This apple has been cut into quarters. This means it has been cut into four equal sized pieces.

Scale describes the amount something is smaller or larger something is from its real size, or just a general description of size, like a large scale project.

It is also the singular of scales.