Mathematical terms and concepts MAT A

The magnitude of a number, irrespective of its sign. Written as a number inside vertical lines: [3] =3 and [-3]=3.

An angle measuring less than 90°. A triangle with three of these is called a ______ triangle.

Two line segments coming together at a point called the vertex.

A measure, in square units, of the size of a region in a plane. Finding the _____ of a figure usually involves multiplying two dimensions, such as length and width or base and height. The _____ of a circle is found by multiplying pi by the square of the radius.

An integer that has more factors than one and itself; i.e., a nonprime integer greater than 1. The first ten are 4,6,8,9,10,12,14,15,16,18.

Two angles whose measures add up to 90 degrees.  ex.- A 30 degree angle and a 60 degree

A solid generated by rotating a right triangle about one of its legs

A rectangular solid whose faces are all squares.

A line segment formed by the intersection of two faces of a three-dimensional shape.

A number to be divided  (e.g. in 12/3= 4 it is 12)

A number that divides into another number

An oval shape, literally a set of points in a plane for which the sum of the distances from two points (called foci) is constant

A triangle with three equal sides and three equal angles of 60 degrees.

a polygon formed by edges of a solid

A positive integer that divides into n with no remainder

The side of a right triangle opposite the right angle. Also the longest side.

A number that cannot be represented on the number line because it contains a factor of i

Any of the natural numbers (also known as "whole numbers"), the negatives of these numbers, or zero.

A triangle with two sides of equal length

The two sides of a right triangle that are not the hypotenuse (i.e. are not opposite the right angle)

A number that n will divide into with no remainder. Some of the multiples of 18 are 0,18,36, 54,72, and 90.