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Sagot :
Answer:
c. Cyclic
Step-by-step explanation:
You want to know what kind of quadrilateral has a pair of opposite angles that are supplementary.
Opposite angles
Opposite angles of a parallelogram, including a rhombus and rectangle, are congruent. They happen to be supplementary in a rectangle, because they are both 90°.
When a quadrilateral is cyclic, its vertices lie on a circle. Opposite angles will be inscribed angles of that circle intercepting arcs that total the full measure of the circle: 360°. The inscribed angles have half the measure of the arcs, so their sum will be 180°. That is, opposite angles of a cyclic quadrilateral are supplementary.
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Additional comment
A rectangle is a cyclic quadrilateral, but not all cyclic quadrilaterals are rectangles.
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