what angles are congruent in a parallelogram?
92358
['Opposite sides are congruent (AB = DC).', 'Opposite angels are congruent (D = B).', 'Consecutive angles are supplementary (A + D = 180°).', 'If one angle is right, then all angles are right.', 'The diagonals of a parallelogram bisect each other.']
930643
In a parallelogram, opposite sides are parallel and congruent. In a parallelogram, diagonals bisect each other. (THEOREM): Both pairs of opposite sides are parallel and congruent.
103210
If the diagonals of a parallelogram are congruent then the parallelogram is a rectangle. if a parallelogram is a rhombus, then each diagonal bisects a pair of opposite angles. ... if one pair of consecutive sides of a paralleloram are congruent, the parallelogram is a rhombus.
234018
Parallelogram. A Parallelogram is a flat shape with opposite sides parallel and equal in length. Angles "a" and "b" add up to 180°, so they are supplementary angles. NOTE: Squares, Rectangles and Rhombuses are all Parallelograms!
1033284
A parallelogram has no reflectional symmetry. A parallelogram has rotational symmetry of 180º (Order 2). Definition: A rectangle is a parallelogram with 4 right angles.
18657
DEFINITION: A parallelogram is a quadrilateral with both pairs of opposite sides parallel. THEOREM: If a quadrilateral has 2 sets of opposite sides congruent, then it is a parallelogram. THEOREM: If a quadrilateral has 2 sets of opposite angles congruent, then it is a parallelogram.
1331524
If both pairs of opposite sides of a quadrilateral are congruent, then the quadrilateral is a parallelogram. If one pair of opposite sides of a quadrilateral are parallel and congruent, then the quadrilateral is a parallelogram.
877778
A parallelogram is a quadrilateral with opposite sides that are parallel and congruent. Congruent means exactly the same. In this case, a parallelogram has opposite sides that are parallel and congruent meaning that they have the same length.
131919
The diagonals of a parallelogram are sometimes congruent. The diagonals of a rhombus are always perpendicular. The consecutive angles of a parallelogram are never complementary. A square is always a rhombus.
605492
Yes, if both pairs of opposite angles are congruent, then you have a parallelogram. These are all sufficient conditions to have a parallelogram.
540662
A parallelogram is a quadrilateral with opposite sides that are parallel and congruent. Congruent means exactly the same. In this case, a parallelogram has opposite sides that are parallel and congruent meaning that they have the same length. ... A rectangle is a parallelogram with four right angles.
1439142
DEFINITION: A parallelogram is a quadrilateral with both pairs of opposite sides parallel. THEOREM: If a quadrilateral is a parallelogram, it has 2 sets of opposite sides congruent. ... THEOREM: If a quadrilateral has 2 sets of opposite angles congruent, then it is a parallelogram.
1404020
Properties of a Parallelogram and Distance Formula: The properties of a parallelogram are: (i) The sum of all the angles of a parallelogram is always equal to 360o . (ii) The sum of any two consecutive angles of a parallelogram is 180o . (iii) The opposite angles of a parallelogram are also the same.
1109574
The rhombus has the following properties: All the properties of a parallelogram apply (the ones that matter here are parallel sides, opposite angles are congruent, and consecutive angles are supplementary). All sides are congruent by definition. The diagonals bisect the angles. Opposite sides are parallel.
734565
In Parallelogram B, we see that there are four right angles and that the pairs of opposite sides are congruent. However, consecutive sides are not congruent, so we can eliminate rhombuses and squares from our options. Thus, Parallelogram B is a rectangle.
1348984
THEOREM: If a quadrilateral is a parallelogram, it has 2 sets of opposite angles congruent. THEOREM: If a quadrilateral is a parallelogram, it has consecutive angles which are supplementary.
9095
All the properties of a parallelogram apply (the ones that matter here are parallel sides, opposite angles are congruent, and consecutive angles are supplementary). All sides are congruent by definition. The diagonals bisect the angles. The diagonals are perpendicular bisectors of each other.