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6-2 Properties of Parallelograms. Area. Area of Parallelogram A = base x height. 2. 3. 4. 5. 6. 7. 8. Proof. 1. 2. 3. 4. 5. 6. 7. Proof. Theorems. Opposite sides of a parallelogram are congruent. Opposite angles of a parallelogram are congruent.
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Area • Area of Parallelogram • A = base x height
2. 3. 4. 5. 6. 7. 8. Proof
1. 2. 3. 4. 5. 6. 7. Proof
Theorems Opposite sides of a parallelogram are congruent. Opposite angles of a parallelogram are congruent. Consecutive angles of a parallelogram are supplementary. Diagonals of a parallelogram bisect each other.
Theorems If three or more parallel lines cut off congruent segments on one transversal, then they cut off congruent segments on every transversal.
1) Find area of the parallelogram 2) Find area of a parallelogram with vertices (-5,-3), (-2,3), (2,3) & (-1,-3). Examples
Examples 3) If AB=3x + 11, BC = 2x + 19 and CD = 7x – 17, find x. 4) If m<BAD = y and m<ADC = 4y – 70, find y. 5) If m<ABC=2x + 100 and m<ADC=6x + 84, find m<BCD.
Examples • 6) If m<BCD=80 and m<CAD=34, find m<ACD. • 7) If AP=3x, BP=y, CP=6x - 42, and DP=27 - 2y, find x &y.
Examples 8) Find EH.
Example: Honors Geometry Statements Reasons 1. 2. 3. 4. 5. 6.