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19 Cards in this Set
- Front
- Back
angle
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Two rays with a common endpoint. The common endpoint is called the vertex of the angle.
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line segment: a straight path joining two points, called ENDPOINTS of the line segment.
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picture detail: line segment
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line: a straight path that extends infinitely in opposite directions.
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picture detail:
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division
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division: Division "undoes" multiplication; 60/12 = 5
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addition
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Numbers being added are ADDENDS.
The result of addition is called the SUM. Subtraction "undoes" addition. |
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diameter: A line segment that passes through the center of a circle or sphere and has endpoints on the circle or sphere; the diameter of a circle is twice its RADIUS.
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picture detail: diameter, radius.
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angle: right
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A right angle has a measure 90 . See picture.
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Area: The formula for the area of a rect. is A=l*w where A represents the area, l the length, and w the width.
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Area: The formula may also be expressed as A=b*h, where b represents the length of the base and h the height of the rectangle.
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angle: acute
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An acute angle has a measure greater than 0 and less than 90 . See picture.
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product
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product: the result of multiplication is called the product.
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angle: obtuse
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An obtuse angle has a measure greater than 90 and less than 180 . See picture.
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multiply: to multiply is to do a multiplication operation.
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picture detail: multiplication operation
3 5 = 15 |
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Angle: straight
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A straight angle has measure of 180 . See picture.
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Area: the measure of the surface inside a closed boundary. See picture
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area model for 3*5=15
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Angles: adjacent
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Two angles with a common side that do not otherwise overlap. In the diagram, angles 1 and 2 are adjacent angles. So are angles 2, 3 and 4, 4, 1. See picture.
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factor
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factors: Numbers being multiplied are called factors.
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Angles: vertical
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angles: vertical
Two intersecting lines from four angles. In the diagram, angles 2 and 4 are vertical angles. They have NO sides in common. Their measures are EQUAL. Angles 1 and 3 are also vertical angles. See picture. |
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radius: picture detail
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radius: A line segment from the center of a circle or sphere to any point on the circle or sphere; also, the length of such a line segment.
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absolute value
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The absolute value of a positive number is the number itself. The absolute value of a negative number is the opposite of that number. I.e., -6 is 6.
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