Quiz 6-1 to 6-5
Square
A parallelogram with four congruent sides and four right angles.
Rhombus
A parallelogram with four congruent sides.
Rectangle
A parallelogram with four right angles.
Parallelogram
A quadrilateral with both pairs of opposite sides parallel.
Trapezoid
A quadrilateral with exactly one pair of parallel sides.
Isosceles Trapezoid
A trapezoid whose nonparallel opposite sides are congruent.
Theorem 6-9
Each diagonal of a rhombus bisects two angles of the rhombus.
Theorem 6-6
If both pairs of opposite angles of a quadrilateral are congruent, then the quadrilateral is a parallelogram.
Theorem 6-5
If both pairs of opposite sides of a quadrilateral are congruent, then the quadrilateral is a parallelogram.
Theorem 6-12
If one diagonal of a parallelogram bisects two angles of the parallelogram, then the parallelogram is a rhombus.
Theorem 6-8
If one pair of opposite sides of a quadrilateral is both congruent and parallel, then the quadrilateral is a parallelogram.
Theorem 6-14
If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle.
Theorem 6-13
If the diagonals of a parallelogram are perpendicular, then the parallelogram is a rhombus.
Theorem 6-7
If the diagonals of a quadrilateral bisect each other, then the quadrilateral is a parallelogram.
Theorem 6-4
If three (or more) parallel lines cut off congruent segments on one transversal, then they cut off congruent segments on every transversal.
Theorem 6-2
Opposite angles of a parallelogram are congruent.
Theorem 6-1
Opposite sides of a parallelogram are congruent.
Theorem 6-15
The base angles of an isosceles trapezoid are congruent.
Theorem 6-17
The diagonals of a kite are perpendicular.
Theorem 6-3
The diagonals of a parallelogram bisect each other.
Theorem 6-11
The diagonals of a rectangle are congruent.
Theorem 6-10
The diagonals of a rhombus are perpendicular.
Theorem 6-16
The diagonals of an isosceles trapezoid are congruent.
Base Angles (Trapezoid)
Two angles that share a base of a trapezoid.
