Because they are angles that are subtended by pairs of sides that are parallel to each other.
There are several ways of proving the angles are equal.
Yes, the opposite interior angles of a parellelogram are equal.
Yes. A parallelogram is defined as having opposite sides that are parallel and equal in length, and opposite angles that are equal.
A parallelogram with equal sides is a rhombus. If the interior angles are right angles, it's a square.
yes opposite angles are equal
A parallelogram has 2 equal opposite acute angles and 2 equal opposite obtuse angles.
Yes, the opposite interior angles of a parellelogram are equal.
Yes. A parallelogram is defined as having opposite sides that are parallel and equal in length, and opposite angles that are equal.
All the angles in a parallelogram can be equal, but are not always.
A square is always a parallelogram b/c a parallelogram is a quadrilateral with two pairs of parallel sides. The opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. A square is always this.
A parallelogram with equal sides is a rhombus. If the interior angles are right angles, it's a square.
yes opposite angles are equal
NOImproved Answer:-Yes a rhombus has equal opposite acute angles and equal opposite obtuse angles
A parallelogram has 2 equal opposite acute angles and 2 equal opposite obtuse angles.
It has one pair of opposite angles that are equal but not two.
A square and a rectangle have opposite equal 90 degree angles. A parallelogram and a rhombus have 2 opposite equal acute angles and 2 opposite equal obtuse angles.
No, If all angles are equal and all sides are equal, then it is a regular polygon (otherwise it is 'irregular'). In this case, parallelogram is irregular.
Yes, the opposite angles in a regular quadrilateral are equal.