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What is a rectangle always an example of?
A rectangle is always a quadrilateral and a parallelogram.
Are consecutive angles in a parallelogram always congruent?
Not unless the parallelogram is a rectangle. In every parallelogram, consecutive angles are supplementary.
If both diagonals of a quadrilateral bisect each other when is the quadrilateral a parallelogram?
always
Which quadrilaterals are opposite angles always congruent?
(1) Parallelogram A parallelogram is a quadrilateral with two sets of parallel sides. The opposite or facing sides of a parallelogram are of equal length, and the opposite angles of a parallelogram are equal.(2) SquareA square is a regular quadrilateral. This means that is has four equal sides and four equal angles.(3) RhombusA rhombus is a quadrilateral whose four sides all have the same length. Opposite angles of a rhombus have equal measure. The two diagonals of a rhombus are perpendicular.(4) RectangleA rectangle normally refers to a quadrilateral with four right angles.ParallelogramSquareRhombus
What is always true about a parallelogram?
It is always true that a parallelogram:is a four-sided shape (a quadrilateral)has opposite sides that are parallel to each other and of the same lengthhas opposite internal angles that equal one anotherhas diagonals that bisect one anotherhas a rotational symmetry of 2.
