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All four angles of a rectangle must equal 90 degrees each.

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If a given parallelogram is a rectangle at least how many of its angles must measure 90?

one


How do you make sure that a given parallelogram is a rectangle at least how many of its angles must measure 90?

A rectangle has 4 interior angles each measuring 90 degrees


To make sure that a parallelogram is a rectangle atleast how many of its angles must measure 90 degrees?

one or 1


Is a quadrilateral which must contain diagonals that are always congruent and must always have four 90 angles?

Yes, a quadrilateral that must contain diagonals that are always congruent and has four right angles is a rectangle. In a rectangle, the diagonals are equal in length, and all interior angles measure 90 degrees. A square, which is a special type of rectangle, also meets these criteria, but a rectangle does not have to be a square.


To make sure that a given parallelogram is a rectangle at least how many of its angles must measure 90?

You need only 1 90 degree angle.


How many obtuse angles in a parrallelogram?

Except for the special case of a rectangle, a parallelogram must have two obtuse angles.


Why is a rectangle not a kite?

a kite has four sides, 2 of each in equal length. just like a rectangle, but a kite has two acute angles, and two obtuse angles.. a rectangle has 4 angles, 90 degrees in measure each. the inside angles must equal 360 degrees, so they can be any numbers, as long as they add up to 360.


Is a rhombus and a rectangle same?

No, a rectangle must have 4 90 degree angles


How many angles of a rectangles must be 90 degrees to make surte its a parallelogram?

If it is a rectangle, then all its angles are 90 degrees and it is a parallelogram!


What is a parallelogram that must have 4 equal angles?

It is a rectangle


If a parallelogram is inscribed in a circle it must be a rectangle?

Yes, a parallelogram inscribed in a circle must be a rectangle. This is because a circle's inscribed angle theorem states that the opposite angles of a cyclic quadrilateral (a quadrilateral inscribed in a circle) must be supplementary. In a parallelogram, opposite angles are equal, which can only hold true if all angles are right angles, thus making the parallelogram a rectangle.


Why aren't parallelograms rectangle?

Adjacent sides of a parallelogram nee not meet at right angles. In a rectangle they must.