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Objectives: Recognize polygons Name polygons Recognize convex polygons Find diagonals of a polygon Identify special types of
quadrilaterals
5.4
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Plane figures Consists only of segments Consecutive sides intersect at endpoints Consecutive sides are noncollinear
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Start at any vertex then proceed either clockwise or counterclockwise
A B
F C
E D
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convex – each interior angle has a measure less than 180°
Example: a) b)
For our class, we will be using only convex polygons unless the problem states otherwise.
5.4
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diagonal – a segment that joins two nonconsecutive vertices
5.4
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Quadrilateral: a four sided polygon
Parallelogram: a quadrilateral with both pairs of opposite sides parallel
Rectangle: a parallelogram with at least one right angle
Rhombus: a parallelogram with at least 2 consecutive congruent sides
Kite: a quadrilateral in which 2 pairs of consecutive sides are congruent, but opposite sides are not congruent *
5.4
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Square: a parallelogram that is both a rectangle and a rhombus
Trapezoid: a quadrilateral with exactly 1 pair of parallel sides
Isosceles Trapezoid: a trapezoid with the non-parallel sides congruent
5.4