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Topic 9			Lesson 9-6,[object Object],QUADRILATERALS,[object Object]
Figures with four sides are called “quadrilaterals”.,[object Object],“Quad” means 4.  ,[object Object]
Quadrilaterals can be classified by their angles or pairs of sides.,[object Object]
“Poly” means “many”.,[object Object],So any polygon with 4 sides is called a “quadrilateral” because it has many sides.,[object Object]
Let’s look at some different types of quadrilaterals.,[object Object],   rhombusparallelogram,[object Object],  trapezoidrectanglesquare	,[object Object]
rectangle,[object Object],4 right angles   ,[object Object], also called a parallelogram,[object Object]
rhombus,[object Object], opposite sides are parallel and all sides      are the same length,[object Object]
square,[object Object],4 right angles,[object Object],All sides are the same length.,[object Object],It is a parallelogram, rhombus, & a rectangle.,[object Object]
A square has 4 right angles.  A rhombus does not.,[object Object],What is the difference between a rhombus and a square?,[object Object]
So a square is also a rhombus, but a rhombus is not a square!,[object Object]
parallelogram,[object Object],    2 pairs of parallel sides,[object Object]
trapezoid,[object Object],   only one pair of parallel       sides,[object Object]
Now you can recognize quadrilaterals.,[object Object]

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