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13 Cards in this Set

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