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Geomtery: Unit 5
Flashcards reviewing Geometry Unit 5.
22
Mathematics
10th Grade
01/19/2011

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Term
the length of the boundary of a region
Definition
perimeter
Term
the process of iterating a unit over a quantity
Definition
measurement
Term
The perimeter of a polygon is the ______.
Definition
sum of the lengths of its sides
Term
What formula is this for?
h=height
b=base
P=2b+2h
Definition
the perimeter of a rectangle
Term
the number of square units in the interior of a figure
Definition
area
Term
What is the formula for the area of a rectangle with b=base and h=height?
Definition
A=bh
Term
regions are _____ if a point in the interior of one region is not in the interior of another region
Definition
nonoverlapping regions
Term
What is the following postulate called:
If a figure is made up of nonoverlapping regions, then the area of the figure is the sum of the area of the regions.
Definition
Area Sum Postulate
Term
What is the formula for the area of a triangle if the area is half the area of a rectangle with the same base and height?
Definition
A=1/2bh
Term
Congruent triangles remain the same size and shape no matter how they are orientated and have the same ___.
Definition
area
Term
a perpendicular line segment that extends from a vertex to a line containing the base opposite that vertex
Definition
altitude
Term
What is the formula for a parallelogram? What is the difference between the formula for a parallelogram and the formula for a rectangle?
Definition
A=bh
The height of a nonrectangular parallelogram is not one of the sides of the figure.
Term
What is the formula for the following?
A=1/2(b1+b2)h
Definition
area of a trapezoid
Term
a polygon with four sides
Definition
quadrilateral
Term
a quadrilateral with both pairs of opposite sides parallel
Definition
parallelogram
Term
a quadrilateral with just one pair of opposite sides parallel
Definition
trapezoid
Term
a parallelogram with four right angles
Definition
rectangle
Term
a parallelogram with four congruent sides
Definition
rhombus
Term
a parallelogram with four right angles and four congruent sides
Definition
square
Term
The formula for the area of a parallelogram is the same as the formula for a rectangle, but the difference is that the height of a nonrectangular parallelogram is _____.
Definition
not one of the sides of the figure
Term
The ___ of a trapezoid are its two parallel sides. The ___ of a trapezoid are its nonparallel sides.
Definition
bases; legs
Term
What is the formula for the area of a trapezoid?
Definition
A=1/2(b1+b2)h
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