42 terms

Math PSSA Vocab

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Acute Triangle
A triangle that has each angle measuring less than 90°.
Adjacent Triangle
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 parallel lines & 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.
Chord
The distance from one point on the circle to another point on the circle.
Diameter
The distance across a circle through its center.
Radius
The distance from the center of a circle to a point on the circle.
Coefficient
In 3x, 3 is the coefficient of x (the number multiplying a variable).
Complementary Angles
Two angles whose sum is 90°.
Compound Event
An event made up of two or more simple events.
Congruent
Shapes that have the same shape (angles) and same size (dimensions).
Coordinate Plane/Graph
A two-dimensional system in which the coordinates of a point are its distances from both a horizontal and a vertical line called the axes. The pairs of numbers are called ordered pairs. The first number, called the x-coordinate, designates the distance along the horizontal axis. The second number, called the y-coordinate, designates the distance along the vertical axis. The point at which the two axes intersect has the coordinates (0,0) and is called the origin.
Corresponding Angles (1)
When a transversal intersects two lines, corresponding angles are on the same side of the transversal and on the same side of the given lines. In the figure below, angles 1 and 2 are corresponding.
Corresponding Angles (2)
Angles in the same relative position in similar or congruent figures.
Equilateral Triangle
A triangle in which all sides are 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.
Mutually Exclusive Events
Two events that cannot occur at the same time.
Net
A two-dimensional shape that can be folded to create a three-dimensional shape.
Obtuse Triangle
A triangle with one angle that is greater than 90 degrees.
Order of Operations
Rules describing what sequence to use in evaluating expressions. (1) Perform operations in grouping symbols. (2) Evaluate Exponents. (3) Multiply or divide from left to right. (4) Add or subtract from left to right.
Origin
Intersection point of both x and y axes on the coordinate graph.
Perfect Square
The product of an integer multiplied by itself.
Permutation
Possible orders, or arrangements of a set of items. Placing these items in a different order results in a new permutation.
Prism
A three-dimensional solid that has two congruent and parallel faces that are polygons. The remaining faces are rectangles. Prisms are named by their bases.
Proportion
An equation showing that two ratios are equal.
Pythagorean Theorem
A formula or finding the length of a side of a right triangle when the lengths of two sides given.
Quadrants
Four sections of the coordinate graph.
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.
Similar
Shapes that have the same shape (angles) and proportional side lengths (same scale factors).
Skew Lines
Are not parallel or intersecting.
Stem-and-Leaf Plot
A data that shows groups of data arranged by place value.
Supplementary Probability
Two angles whose measures, when added together, equal 180°.
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.
Vertex (Vertices)
Intersection of two sides of a polygon (corners).
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