Trapezoids Section 6-6. trapezoid – a quadrilateral with exactly one pair of parallel sides The parallel sides are called bases. The nonparallel sides.

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Presentation transcript:

Trapezoids Section 6-6

trapezoid – a quadrilateral with exactly one pair of parallel sides The parallel sides are called bases. The nonparallel sides are called legs. base leg base

isosceles trapezoid – a trapezoid that has congruent legs

Thms & 8-19 Both pairs of base angles of an isosceles trapezoid are congruent. The diagonals of an isosceles trapezoid are congruent. A B CD AC BD

The median of a trapezoid is the segment that joins the midpoints of its legs.

Theorem 8-20 The median of a trapezoid is parallel to the bases, and its measure is one-half the sum of the measures of the bases.

Joke Time What’s big, gray, and wears glass slippers? Cinderellaphant

How do you prove that girls are evil? (Submitted by Nick Collins) 1. Girls require time & money. Girls = time x money 2. We all know that time is money. time=money 3. Girls = money x money (substitution) 4. Girls = (money) 2 (substitution) 5. Money = square root of evil 6. Girls = ( ) 2 (substitution) 7. Girls = Evil (substitution)