Math Dictionary

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Math Dictionary

• Serena and Elke

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Directions

• Welcome to Serenas and Elkes Math Dictionary!
• Sit back, relax, and study for the PSSA s!
• Have FUN!!!!!!!!!!!!!

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Acute Angle

• An angle that has a measure less than 90 degrees.

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Area

• The number of square units needed to cover a
  closed figure.

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Chord

• A line segment with both end points on a circle.

Line segment
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Circumference

• The distance around a circle.

circle
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Cone

• A solid figure with one circular base and one
  vertex.

One vertex
Circular base
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Composite Number

• A whole number greater than one that has more
  than two different factors.
• 60, 18, 112.

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Congruent Figures

• Figures that have the same size and shape.

Same figures
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Cube
All the same sides

• A solid figure whose six sides are all squares.

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Cylinder
Two congruent faces

• A solid figure with two congruent circular faces.

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Diameter

• A line segment that goes from one point in a
  circle to another point through the center.

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Edge

• A line segment at which two face of a solid
  figure meet.

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Equilateral

• A figure ( triangle) with all its sides equal

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Face

• A flat surface of a solid figure

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Factors

• Numbers that are multiplied together to obtain a
  product
• .
• Such as 2 is multiplied by two to get 4 so 2 is a
  multiple of 4.

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Flip

• To turn a plane figure over.

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Hexagon

• A polygon with six sides.

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Intersecting

• Lines that cross a point.

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Inverse Operation

• An operation that reverses another operation.
• 325
• 5-23

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Line

• A straight path that is endless in both
  directions.

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Isosceles and Scalene Triangles

• Triangles that have at least two or three slides.

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Leg

• The side of a right triangle

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Line of symmetry

• A line on which a figure can be folded so that
  both halves are congruent.

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Mean

• The number found when the sum of two or more
  numbers is divided by the number of addends. Also
  known as the average.

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Median

• The middle number when data is arranged in order.

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Mode

• The number or numbers that occur most often in a
  set of numbers

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Multiples

• The products of a given whole number and any
  other whole number.

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Negative Numbers

• Numbers that are less than zero.
• 2

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Net

• A pattern that can be cut out and folded into a
  solid.

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Obtuse Angle

• A angle with the measurement thats more than 90
  degrees.

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Octagon

• A polygon with eight sides.

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Pattern

• A sequence of objects, events, or ideas that
  repeat.

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Parallel Lines

• Lines that lie in the same planes and do not
  intersect.

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Parallelogram

• A quadrilateral that has two pairs of opposite
  parallel sides.

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Pentagon

• A polygon with five sides.

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Perimeter

• The distance around a closed figure.

Add up the length of all the sides to find the
____
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Perpendicular Lines

• Two lines that form right angles when they
  intersect.

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Polygon

• A closed plane figure made up of line segments.

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Prime Number

• A whole number greater than one than only has two
  factors. One and itself.
• 5

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Pyramid

• A solid figure whose base is a polygon and whose
  faces are triangles with a common vertex.

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Quadrilateral

• A polygon that has four sides.

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Radius

• A line segment from the center of a circle to any
  point of the circle.

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Ray

• Part of a line that begins at a point and is
  endless in one direction.

The point and the line
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Range

• The difference between the greatest and least
  number in a set of data.
• The set of numbers
• 14, 3, 5, and 6
• The largest number is14 and the smallest is 3 so
• 14-311 the range is 11

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Rectangular Prism

• A solid figure whose six faces are all rectangles.

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Rectangle

• A quadrilateral with two parallel sides and have
  only two equal sides.

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Rhombus

• A quadrilateral with two pairs of parallel sides
  and all sides the same length.

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Right Angle

• An angle that has a measure of 90 degrees.

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Right Triangle

• A triangle that has one right angle

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Slide

• To move a plain figure in one direction.

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Sphere

• A space figure shaped like a round ball.

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Square

• A quadrilateral that has four equal sides and
  four right angles.

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Similar Figures

• figures that have the same shape but not
  necessarily the same size.

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Symmetrical

• A design, or object that has one or more lines of
  symmetry.

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Straight Angle

• A angle that has a measure of 180 degrees.

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Transformation

• The moving of a figure by translation. Also known
  as flip!

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Trapezoid

• a quadrilateral that has exactly one pair of
  parallel sides.

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Turn

• To rotate a plane figure.

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Vertex

• The point that two rays of an angle have in
  common. Also, a point wher two or more edges meet.

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Volume

• The number of cubic units used to fill a solid
  figure.

One, two, three, four, five, six.
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THANK YOU!!!!!!!!

• Hope you enjoyed the show, and are now ready for
  the PSSA s!