TODAY IN GEOMETRY…  REVIEW: Properties of Parallelograms  Practice QUIZ 8.1-8.2  Learning Target : 8.3 Prove a quadrilateral is a parallelogram  Independent.

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Presentation transcript:

TODAY IN GEOMETRY…  REVIEW: Properties of Parallelograms  Practice QUIZ  Learning Target : 8.3 Prove a quadrilateral is a parallelogram  Independent Practice  Ch.7 RETAKES

1.Opposite sides are congruent. 2.Opposite angles are congruent. 3.Consecutive interior angles are supplementary. 4.Diagonals bisect each other. PROPERTIES OF PARALLELOGRAMS:

IN CLASS PRACTICE QUIZ: USE WHITEBOARDS in pairs. Show ALL work. Box your solutions.

IN CLASS PRACTICE QUIZ SOLUTIONS:

PROVING A QUADRILATERAL IS A PARALLELOGRAM: 1. Show BOTH PAIRS of opposite sides are parallel (same slope). 2. Show BOTH PAIRS of opposite sides are congruent (same distance). 3. Show BOTH PAIRS of opposite angles are congruent 4. Show ONE PAIR of opposite sides are congruent and parallel (same slope and distance). 5. Show the diagonals bisect each other.

PRACTICE: (4) One pair of opposite sides are parallel and congruent (2) Both pairs of opposite sides are congruent (3) Both pairs of opposite angles are congruent

EXAMPLE: For what value of x is the quadrilateral a parallelogram?

HOMEWORK #3: Pg. 526: 8-14, 19-21, 25-27, If finished, work on other assignments: HW #1: Pg. 510: 3-16, 19, HW #2: Pg. 518: 3-11, 13-15, 23-31