Chapter 11: Area Flashcards
Formula for finding the area of a rectangle
A= hb
Formula for finding the area of a square
A= s2
Find the area of a parallelogram
A= hb
*h is perpendicular to the base.
Find the area of a triangle.
A= .5 (bh)
Area Congruence Postulate
If two polygons are congruent, then they have the same area.
Area Addition Postulate
The area of a region is the sum of the area of its non-overlapping parts.
What are similar figures?
Two figures that have proportional sides.
What is the ratio of the perimeter equal to?
The ratio of side lengths.
What is the ratio of the area equal to?
The square of the ratio of the side lengths.
Formula for finding the arc length.
Arc length= measure of arc/360 x pi2r
Find the area of the circle.
A= r2pi
Find the area of a sector
A= m. of arc/360 x r2pi
Find the area of a polygon.
A= .5 x asn OR A= .5 x ap
Find the perimeter of a polygon.
s x n = P
Find the area of a rhombus.
A= .5 (d1) (d2)