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# Are opposite angles in a parallelogram supplementary?

Updated: 4/28/2022

Wiki User

14y ago

No, they are equal. Adjacent angles are supplementary in a prallelogram.

Wiki User

14y ago

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Q: Are opposite angles in a parallelogram supplementary?
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Related questions

### If opposite angles of a quadrilateral are supplementary is the quadrilateral a parallelogram?

No. A quadrilateral is a parallelogram when consecutiveangles are supplementary.

### Do opposite angles in a parallelogram add up to 180?

No. Opposite angles are equal. Adjacent angles are supplementary.

### How Dow you that the opposite angles of a parallelogram are equal?

First of all, you know the opposite sides of a parallelogram are equal because of the definition of a parallelogram. Therefore, two adjacent angles in the parallelogram are supplementary, because same-side interior angles in two parallels and a transversal are always supplementary. Therefore, opposite angles in a paralellogram are equal, because two angles both supplementary to a third angle are equal to each other.

### Are adjacent angles in a parallelogram are supplementary?

Adjacent angles in a parallelogram are supplementary.

True

false

false

### What properties apply in a parallelogram?

Consecutive angles are supplementary Diagonals bisect each other Opposite angles are congruent Opposite sides are parallel

### If a quadrilateral is a parallelogram then its opposite angles are always supplementary?

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.

### Are the opposite angles of any parallelograms are supplementary?

Yes, when they are both 90o and the parallelogram is usually referred to as a rectangle.

### What are facts about parallelogram?

Opposite sides are congruent Opposite sides are parallel Opposite angles are equal Consecutive angles are supplementary Diagonals bisect each other Diagonals form 2 equal triangles

### If a parallelogram has one right angle then all of its angles must be right?

Yes. This is true because opposite angles are congruent and adjacent angles are supplementary.