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13 Cards in this Set
 Front
 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
