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