Chapter Five: Polygons

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Chapter FivePolygons

• Section 5-7
• Properties of Trapezoids

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Recall Trapezoid

• A Trapezoid is a quadrilateral with just one pair
  of parallel sides.

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Isosceles Trapezoid

• An isosceles trapezoid is one where the legs are
  equal.
• Legs
• Base
• Base Angles

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Median

• The segment joining the midpoints of the legs is
  called the median.

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Theorem 13

• The base angles in an isosceles trapezoid are
  congruent.

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Theorem 14

• The median of a trapezoid has two properties
• It is parallel to the bases.
• Its length equals half the sum of the base
  lengths.

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Example
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14
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HOMEWORK
PAGE 223 (WRITTEN EXERCISES) 3-21 MULTIPLES OF
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