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Q: Given a quadrilateral inscribed in a circle which pairs are valid opposite angle measures?

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No, the circle is inscribed in the quadrilateral.

No. For example, if one angle measures 100 degrees, and its adjacent angle is 80 degrees, then the opposite angles would be either 200 or 160 degrees, but in order for a quadrilateral to be inscribed in a circle the opposite angles would have to equal 180 degrees. A parallelogram can be inscribed in a circle if it is a rectangle.

It is an inscribed quadrilateral or cyclic quadrilateral.

cyclic

yes

Related questions

The opposite angles of a quadrilateral inscribed in a circle have a sum of 180 degrees.

A quadrilateral is inscribed in a circle it means all the vertices of quadrilateral are touching the circle. therefore it is a cyclic quadrilateral and sum of the opposite angles in cyclic quadrilateral is supplementary. suppose if one angle is A then another will be 180 degree - angle A.

No, the circle is inscribed in the quadrilateral.

No. For example, if one angle measures 100 degrees, and its adjacent angle is 80 degrees, then the opposite angles would be either 200 or 160 degrees, but in order for a quadrilateral to be inscribed in a circle the opposite angles would have to equal 180 degrees. A parallelogram can be inscribed in a circle if it is a rectangle.

It is an inscribed quadrilateral or cyclic quadrilateral.

opposite angles are supplementary

cyclic

yes

If a parallelogram is inscribed in a circle then it must be a cyclic quadrilateral.

A cyclic quadrilateral is one where the sum of measures of opposite angles is 180 degrees. I t mostly is formed with the vertices as part of the circumference of a circle.

There is no specific limitation on any one angle of an inscribed quadrilateral.

Any two angles whose measures add up to 180 degrees. For example, opposite angles of a cyclic quadrilateral (quadrilateral whose vertices are on a circle).