#23 Properties of Special Parallelograms

If two parallels lines are intersected by a pair of parallel lines the same distance apart as the first pair, then the parallelogram formed is a rhombus. All sides are congruent. Diagonals of a rhombus are perpendicular. Diagonals of a rhombus are perpendicular bisectors of each other. The diagonals of a rhombus are bisector of of the angles of the rhombus. A rectangle is an equiangular parallelogram. A square is both a rhombus and a rectangle. A square is an equiangular rhombus. A square is an equilateral rectangle. A square has all the properties of both a rhombus and rectangle.

#22 Properties of Parallelograms

– Opposite sides are parallel
– The opposite angles of a parallelogram are congruent.
– The consecutive angles of a parallelogram are supplementary.
– The opposite sides are congruent.
– If LM=VM then M is the midpoint of LV.
– If OM=ME then M is the midpoint of OE.
-EO Bisects LV. LV Bisects EC.
-The diagonals of a parallelogram bisect each other.
– Vectors have both direction and magnitude.
– Length=magnitude
direction of arrow=direction of vector
– The resultant vector (vector sum)

#70 Constructions

#66 Quia for congruent angles

#59 geometry practice problems

#30 Unit 2 Practice