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63 Cards in this Set
- Front
- Back
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Geometry
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means "to measure the earth" Geometry involves measuring shapes.
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Angle
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two rays that share a common endpoint (vertex)
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Perpendicular lines
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lines that intersect to form a right angle.
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Parallel lines
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lines that never intersect
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Similar figures
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figures that have the same shape.
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Congruent figures
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figures that have the same shape and size.
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Intersecting lines
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lines that cross at some point.
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Plane
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is represented by a smooth, flat surgace that has no thickness and extends indefinitely in all directions.
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~
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is the symbol for similar
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Polygon
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a simple, closed figure made up of line segments.
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Triangle
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a polygon with 3 sides
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Quadrilateral
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a polygon with 4 sides
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Pentagon
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a polygon with 5 sides
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Hexagon
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a polygon with 6 sides
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Heptagon
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a polygon with 7 sides
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Octagon
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a polygon with 8 sides
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Vertices
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points where the sides of polygons meet.
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Parallelogram
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a quadrilateral having opposite sides of parallel.
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Numerator
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the top number of a fraction.
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Denominator
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the bottom number of a fraction
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Equivalent fractions
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fractions which have the same value.
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Perimeter
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the distance around a polygon.
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A number is divisible by 10 if
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it ends in 0.
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A number is divisible by 5 if
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it ends in 0 or 5.
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A number is divisible by 3 if
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the sum of its digits is divisible by 3. (for 27, 2+7=9 and 9 is div. by 3.)
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1 foot =
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12 inches
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1 yard =
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3 feet
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1 mile =
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5,280 feet
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1 meter =
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100 centimeters (just like 1 dollar = 100 cents)
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1 kilometer =
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1000 meters (just like Y2K = the year 2000)
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Mode
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the number that appears the most often
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Median
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the middle number
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Mean
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the average
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Area of a triangle =
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1/2 bh (b is base and h is height)
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Area of a rectangle =
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bh
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Arae of a parallelogram =
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bh
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Ratio
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a comparison of two numbers.
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Rate
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a ratio
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Equivalent equations
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equations having the same solution.
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Rectangle
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a quacrilateral having opposite sides parallel and 4 right angles.
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Right angle
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a 90 degree angle.
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Straight angle
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a 180 degree angle (a straight line).
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Square
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a quadrilateral having opposite sides parallel and 4 right angles and all sides equal.
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Rhombus
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a quadrilateral with opposite sides parallel and all sides equal.
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Trapezoid
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a quadrilateral with only one pair of parallel sides.
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Acute angle
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an angle of less than 90 degrees.
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Obtuse angle
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an angle of more than 90 degrees and less than 180 degrees.
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Isosceles triangle
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a triangle having 2 sides =.
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Scalene triangle
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a triangle having no sides =.
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Equilateral triangle
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a triangle having all 3 sides =.
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Sum
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the answer to an addition problem.
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Difference
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the answer to a subtraction problem.
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Product
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the answer to a multiplication problem.
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Quotient
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the answer to a division problem.
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Proper fraction
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a fraction representing a number less than one. (like 1/2, 3/4, 6/9, etc.)
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Improper fraction
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a fraction representing a number more than one. (like 6/3, 3/2, 8/3, etc.)
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Addends
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the numbers being added.
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Factors
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the numbers being multiplied.
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Prime number
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a whole number greater than 1 whose only whole number factors are 1 and itself.
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Composite number
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a whole number greater than 1 which is not prime.
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The product of any number and its reciprocal is ?
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One
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The only number which does not have a reciprocal is ?
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zero
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Dividing by 2 is the same as multiplying by ?
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1/2
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