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# 8th: PSSA Vocabulary

### Use the flashcards to review important math vocabulary.

Acute triangle A triangle that has each angle measuring less than 90 degrees.
Adjacent angles Angles that share a common side and common vertex and do not overlap.
Alternate exterior angles A pair of angles located outside a set of parallel lines and on opposite sides of the transversal.
Alternate interior angles A pair of angles located between a set of parallel lines and on opposite sides of the transversal.
Box-and-whisker plot A graphic method for showing a summary of data using median, quartiles and extremes of data.
Complementary angles Two angles whose measures, when added together, equal 90 degrees. Compound event: An event made up of two or more simple events.
Coordinate plane graph
Ordered pairs Points on a coordinate plane. (x,y)
Origin The point at which the two axes intersect has the coordinates (0,0).
Corresponding angles Angles in the same relative position in similar or congruent figures.
Equilateral triangle A triangle whose sides are all the same length.
Experimental probability A statement of probability based on the results of a series of trials.
Independent events Two events in which the outcome of one event does not affect the outcome of the other event.
Isosceles triangle A triangle that has exactly two congruent sides.
Linear function An equation whose graph in a coordinate plane is a straight line.
Net A two-dimensional shape that can be folded to create a three-dimensional figure.
Obtuse triangle A triangle with one angle that measures more than 90 degrees.
Order of operations Rules describing what sequence to use in evaluating expressions; also known as PEMDAS
Perfect square The product of an integer multiplied by itself (e.g., 121 is a perfect square because 11x11=121).
Permutation Possible orders, or arrangements of a set of items.
Prism A three-dimensional solid that has two congruent and parallel faces that are polygons. The remaining faces are rectangles.
Proportion An equation showing that two ratios are equal.
Pythagorean theorem A formula for finding the length of a side of a right triangle when the lengths of two sides are given.
Scalene triangle A triangle with no congruent sides.
Scatterplot A graph with points plotted to show a relationship between two variables.
Scientific notation A form of writing very large or very small numbers using a number greater than or equal to 1 and less than 10 multiplied by a power of 10 (e.g., 4.7 x 109 = 4,700,000,000).
Stem-and-leaf plot A data display that shows groups of data arranged by place value.
Supplementary angles Two angles whose measures, when added together, equal 180 degrees.
Surface area The sum of the areas of all of the faces of a three-dimensional figure.
Theoretical probability A statement of the probability of an event without doing an experiment or analyzing data.
Vertical angles A pair of opposite congruent angles formed when two lines intersect.
Created by: tsuprick