1. TRAPEZOIDS
Section 8-6
Spi.3.2.H
Jim Smith JCHS

2. Trapezoids are quadrilaterals with exactly 1 pair of parallel sides
Base Angles
A + C = 180
Base A › B
B + D = 180
Leg
Leg C › D
Base

3. Isosceles Trapezoids Have
Congruent Legs | |
1) Base Angles Are Congruent
2) Diagonals Are Congruent

4. The Endpoints Of The Median Of A Trapezoid Is The Midpoints
Of The Legs
Median

5. The Median Is The Average Of The 2 Bases
Median = ½ ( b1 + b2 ) or
2 Median = ( b1 + b2 ) or
The Median Is The Average
Of The 2 Bases

6. X + 2 6 X
median
X + 20 24
4X + 32
2 ( X + 20) = X X + 32
2X + 40 = 5X + 34
40 = 3X + 34
6 = 3X
2 = X
2X =
2X = 30
X = 15