Generally false. In a parallelogram, the opposite angles are equal. They could be complementary in a highly skewed parallelogram in which one angle is 45 degrees.
B. False
No. A rectangle is a parallelogram because all of its sides are parallel, but a parallelogram is not a rectangle because it does not have all right angles. It is a true statement to say that all rectangles are parallelograms. However, the statement that all parallelograms are rectangles is false. A parallelogram is a shape where its opposite sides are parallel to each other, including squares, hexagons, octagons, etc.
False. Every rhombus is a parallelogram, but not every rhombus is a square. Only those that have right angles are squares. Every rhombus is a parallelogram because its diagonal lines are perpendicular, and they bisect an interior angle.
True.
they could both be right angles
false
False. If both pairs of opposite angles of a quadrilateral are congruent then the quadrilateral is a parallelogram.
false
No. A quadrilateral is a parallelogram when consecutiveangles are supplementary.
True
false
False because it will have 2 equal opposite obtuse angles and 2 equal opposite acute angles with the 4 angles adding up to 360 degrees.
false; if both pairs
False, the sum of the angles in a parallelogram is 360 degrees.
false
False because complementary angles have a sum of 90 degrees.
yes