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Earn +20 ptsQ: Is every quadrilateral with at least 1 right angle also a rectangle?
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Is a quadrilateral with at least one right angle and congruent diagonals a rectangle?
Yes
Does quadrilateral have at least one pair of consecutive supplementary angle?
No.
Which quadrilaterals have two obtuse angles?
Every parallelogram and most trapezoids have.Oh wait! It seems to me that every quadrilateral, regular or irregular, that'snot a rectangle and not concave, must have at least two obtuse angles.
What geometric shapes have acute angles?
Any irregular polygon can have an acute angle. A regular triangle (equilateral) has three acute angles. All other triangles must have at least two acute angles. A quadrilateral, other than a rectangle (or square), must have at least one.
What description guarantees that a quadrilateral is a rectangle?
A plane figure with four sides and at least three right angles. There are other descriptions.
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