9-1 Parallelograms

Definition of a Parallelogram: a quadrilateral with two pairs of parallel sides.

Properties: Opposite sides are congruent; The diagonals bisect eachother; opposite angles are congruent.

Proper of Parallel Lines: Consecutive Interior Angles add to be 180 degrees; Alternate Interior Angles are congruent.

9-2 Rhombuses

Definition: A parallelogram with 4 congruent sides (2 consecutive sides).

Properties of a Parallelogram

Opposite sides are congruent.

Diagonals bisect eachother.

Alternate Interior Angles are congruent.

Opposite angles are congruent.

Consecutive Interior Angles add to = 180 degrees.

Have 4 congruent sides.

Properties of a Rhombus

Diagonals are Perpendicular.

Diagonals bisect the vertical angle.

Properties of Squares and Rectangles

Rectangle: A parallelogram with 1 right angle; opposite sides are congruent; diagonals bisect eachother; opposite angles are congruent; consecutive interior angles add to = 180 degrees; alternate interior angles are congruent.

Square: A parallelogram with 2 congruent consecutive sides and 1 right angle; is considered to be a rectangle or a rhombus; opposite sides are congruent; diagonals bisect eachother; opposite angles are congruent; consecutive interior angles add to = 180 degrees; alternate interior angles are congruent; diagonals are congruent; the diagonals are perpendicular; the diagonals bisect the vertex angles.

Problem 1-1

What is a Property of a Rhombus?

Site hosted by Angelfire.com: Build your free website today!