The ABCs of Math

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The ABCs of Math
By Mrs. Meinertzs Class
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Area

• Area is the size a surface takes up measured in
  square units.
• We find the area a rug covers on the floor.

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Bar Graph

• It uses bars to show how much of something.
• They can easily compare numbers.

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Congruent

• All sides and are the same and it is the same
  size and angles.
• The two balls are congruent.

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Divisor

• A number that will divide the dividend.
• A divisor is in an equation like four puppies
  divided by two.

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Equilateral

• Equilateral is a triangle with three equal sides
  and three equal angles.
• You would see one as a yield sign.

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Factor

• Factor a whole number that divides exactly
  another number.
• If there are six cookies I will tell you the
  factors
• 1and 2 are factors of 6 and so is 3.

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Gallon

• Standard unit of capacity for measuring liquids.
• We measure milk in gallons.

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Hexagon

• A polygon with six sides.
• The tiles show hexagons.

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Isosceles Triangle

• Triangle with two equal sides and two equal
  angles.
• A Christmas tree is an isosceles triangle.

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Join

• It is to put or bring together so as to make
  continuous.
• All the states join together to make our country.

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Kilometer

• Standard metric unit for measuring distance.
• You see this on the highway in United Kingdom
  instead of miles.

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Line Segment

• A long thin continuous mark, that is part of a
  line.
• A train track is a long line segment.

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Mean

• The mean is the average of a number of different
  amounts.
• The average in Rhode Island January the
  temperature is 29 degrees F.

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Numerator

• It is a number above the line of the fraction,
  showing the number of parts of the whole.
• Sometimes I see a numerator when people are
  advertising the prices of the gas. Nine is the
  numerator in this sign.

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Obtuse Angle
The black hands on this clock make an obtuse
angle.

• Any angle between 90 degrease and 180 degrease.
• Sometimes the hands on a clock are an obtuse
  angle.

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Perimeter

• Distance around the outside of a shape.
• A fence can go around the edge of a field.

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Quadrilateral

• It is a polygon with four sides.
• You would see it at the supermarket, like a box
  of Junior Mints.

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Rhombus

• Rhombus is a parallelogram with four equal sides
  and equal opposite angles.
• A baseball infield is a rhombus because it has
  four equal sides.

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Similar Figures

• Two shapes are similar if they have the same
  shape but different sizes.
• These coffee cups are the same shape but a
  different size so they are similar.

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Turn

• To turn is to rotate around a point.
• A wheel on a car turns when you drive it.

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Vertex

• Point where surfaces meet (corner).
• Like on the corners of a stop sign.

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Whole Number

• A counting number from 0 to infinity.
• We use whole numbers to count.

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X-Axis

• The horizontal axis of a graph.
• The months are along the x-axis.

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Year

• The time it takes the earth to completely orbit
  the sun, equal to 12 months, 52 weeks or 365
  days.
• We can use a calendar to measure a year.

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Zero

• A number meaning nothing or none.
• There are 0 trees in this picture.