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13 Cards in this Set
- Front
- Back
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We use _____ as an approximation for pi.
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3.14
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One way to find the area of a parallelogram or a trapezoid is to divide the figure into _____ triangles. Then we can find the area of each triangle and add them together.
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two
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We measure area in ________ units.
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square
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It is sometimes helpful to think of a _____________ sign as "the opposite of."
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negative
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Area of a rectangle = ___x___
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length x width
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Area of a square = ___x___
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side x side
(or square the length of a side) |
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-(-3) - [-(-4)] + [-(-6)]
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-(-3) - [+4] + [+6]=
+(+3) + (-4) + (+6)= (+9) + (-4) = 5 |
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The ______ of a closed figure is the number of square units contained in the figure.
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area
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-2 is the __________ of 2.
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opposite
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To find the area of a triangle, we multiply the base times the height and then divide by _____.
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2
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When looking for the height of a triangle, we need to remember that the base must be ____________ to the height.
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perpendicular
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Area of a __________ =
(pi)(radius)(radius) (or "pi r squared") |
circle
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+(-5) + [-(-6)] =
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+(-5) + [+6] = +1
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