1. Do-Now 1)Find x. 2) Find x. 4x + 1 3x + 1 2x + 14 5x 2x – 10 x 2 – 2x – 69

2. Parallelograms 1)Parallel – lines that do not intersect – have the same slope 2) Perpendicular – lines that intersect at a 90 ° angle. – slopes are negative reciprocals 3) Quadrilateral – 4-sided figure 4) Parallelograms – quad. with both pairs of opp. sides parallel. *opp. sides are congruent *opp. angles are congruent *consecutive angles are supplementary *diagonals bisect each other *interior angles add up to 360 ° Quick Facts

3. Types of Parallelograms Rhombus – parallelogram with 4 congruent sides – diagonals are perpendicular – diagonals bisect the angles Rectangle – parallelogram with 4 right angles Square – parallelogram with 4 right angles and 4 = sides – opposite sides are congruent – diagonals bisect each other – diagonals are =

4. Practice – Find the value of x. 1) Rhombus 2) Rectangle 14x – 1012x – 4 x 2 – 3x – 41 4x + 3 3) Square 4) Parallelogram 5x 4x + 18 3x + 10 4y – 11 x + 3 2y – 12