How Do We Find The Area of Parallelograms, Kites and Trapezoids?
Trapezoid
a quadrilateral with exactly one pair of parallel sides
Area= (b1+b2)/2(h)
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Kites
two pairs of consecutive congruent sides
Area= d1d2/2

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http://www.gotoandplay.it/_articles/2004/07/3dCube/cube.gif
Properties
Solids have properties such as:
-volume (think of how much water it could hold)
- surface area (thinks of the area you would have to paint)
Two types of solids, "polyhedral", and "non-polyhedral"
Polyhedra
They must have flat faces
Prism
Has the same cross section all along it's length
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Pyramids
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Non- Polyhedra
Any surface that isn't flat
examples:
Sphere
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Torus
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Cylinders
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Cone
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Cross sections
The shape you get when cutting straight across an object
Surface Area
Area of the bases + lateral area (area of the sides)
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http://math.tutorvista.com/geometry/quadrilaterals.html
In the example above, the diagonals bisect the angles and they also bisect each other.
Rectangle
Parallelogram with four congruent angles or an "equiangular parallelogram."
http://www.geom.uiuc.edu/~dwiggins/conj28.html
The diagonals of a rectangle are congruent and they bisect each other.
Equilateral Rectangle
Equiangular rhombus
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http://quizlet.com/6547298/geometry-terms-cfh-flash-cards/
Diagonals are congruent, perpendicular and they bisect each other.
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