{Exam Study guide

Pre-algebra

Vocabulary:

Congruent: means the same Corresponding angles: A pair of angles that lie on the

same side of the transversal and are in corresponding positions.

Dilation: The increase or decrease in the size of a figure.

Hypotenuse: The side opposite of the right angle in a right triangle.

Integers: Whole numbers and their opposites. Interior Angles: angles on the inside of two lines cut by

a transversal. Irrational Numbers: Any real number that cannot be

written as a fraction; it is infinite and non-repeating. Legs: two sides that form the right angle in a right

triangle. Like terms: terms with the same variable. Numerator: the top of a fraction Perfect Square: its value is an integer and it’s a rational

number.

Proportion: An equation that states that two ratios are equivalent.

Radical: symbol used to represent square roots. Rational numbers: any real number that can be written as a

fraction. Real numbers: both rational and irrational numbers Reciprocal: when you flip the numerator and the

denominator. Reflection: a transformation that flips a figure over a line of

reflection. Rotation: a transformation that turns a figure about a point. Scale factor: the amount that you are increasing or

decreasing a figure by. Scientific notation: a way to abbreviate very large or very

small numbers using powers of ten. Sphere: a 3-d figure with all points the same distance from

the center.

Supplementary: two angles whose measures have a sum of 180 degrees.

Translation: a transformation that slides a figure on a coordinate plane.

Good Luck!!!