CHAPTER 7: AREABy: Brianna Tillery, Troy Jones, and
Silvestre Rojas
Area of parallelogram
A four sided plane rectilinear figure with opposite sides parallel.
Area = base x height
If H= 5 and B = 2 what is the area?
Area of rectangles
A plane figure with four straight sides and four right angles
Area = w × l w = width l = length
Width x Length = area 3.5 cm x 6cm =
Area of squares
A plane figure with four equal straight sides and four right angles.
area = width × height
A x B = Area
If a = 15 and b = 7 what is the area?
Area of a Rhombi
Is a convex quadrilateral whose four sides all have the same length
Convex means: curving out or bulging outward
Area = B x H or Area = D1 x D2 / 2
B x h
if b = 12 and h = 5 what is the area?
If diagonal 1 = 9 and diagonal 2 = 14 then what is the area?
Area of a Triangle
A polygon with three corners or vertices and three sides or edges which are line segments
Area = ½ B x H
H= 8 and B= 13 What is the area?
Area of a Trapezoid
is a 4-sided figure with one pair of parallel sides
Area = ½ x (B1 + B2 ) x H
If b1= 5 and b2= 7 and the H= 4 then what is the area?
Websites And Sources
http://www.mathgoodies.com/lessons/vol1/area_trapezoid.html
http://wiki.answers.com/Q/What_is_the_formula_for_the_area_of_a_rhombus
http://www.mathopenref.com/rhombusarea.html
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