trapezoid properties objective: discover properties of trapezoids
Post on 18-Jan-2016
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Trapezoid Properties
Objective: Discover properties of trapezoids
First of All:
• What is a trapezoid?
• a trapezoid is a quadrilateral with exactly one pair of parallel sides.
Angles/Sides in a Trapezoid
Consecutive Angles
Recall: Supplementary angles are two angles which add up to 180.
Isosceles Trapezoid
• a trapezoid whose two nonparallel sides are the same length is called an isosceles trapezoid
Line of Symmetry• There is one line of
symmetry for all trapezoids
• What points do you think this line of symmetry crosses through?
• The line of symmetry splits the trapezoid in half. Therefore, the line goes through the midpoints of the bases
Base Angles of an Isosceles Trapezoid
x
ba
yx=y
a=b
Diagonals
X
BA
Y
𝑋𝐵=𝐴𝑌
Let’s Practice!
Let’s Practice!
Let’s Practice!
Let’s Practice!
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