# Question: A parallelogram must be a rectangle when its?

## When must a parallelogram be a rectangle?

Remember, for a parallelogram to be a rectangle is must have four right angles, opposite sides congruent, opposite sides parallel, opposite angles congruent, diagonals bisect each other, and diagonals are congruent. A square satisfies all of these requirements, therefore a square is always a rectangle.

## Can a parallelogram be considered a rectangle?

A rectangle is a quadrilateral in which all angles are right angles. A rectangle is a parallelogram, so its opposite sides are equal. The diagonals of a rectangle are equal and bisect each other.

## Is a parallelogram always a rectangle yes or no?

Its properties include that each pair of opposite sides is parallel, also making it a parallelogram. In summary, all squares are rectangles, but not all rectangles are squares. All rectangles are parallelograms, but not all parallelograms are rectangles. And all of these shapes are quadrilaterals.

## What are the requirements for a parallelogram?

You’ll know that your quadrilateral is a parallelogram if it has these properties of parallelograms:

• The opposite sides are parallel.
• The opposite sides are congruent.
• The opposite angles are congruent.
• Consecutive angles are supplementary (add up to 180-degrees).
• The diagonals bisect each other.

## How do you prove a rectangle is a square?

A rectangle is a square if and only if its diagonals are perpendicular. if the diagonals in a rectangle are perpendicular, then the rectangle is a square.

## What is a parallelogram that is not a rectangle?

A parallelogram is a quadrilateral with 2 pairs of opposite, equal and parallel sides. A rectangle is a quadrilateral with 2 pairs of opposite, equal and parallel sides BUT ALSO forms right angles between adjacent sides. It confused me that a parallelogram is never considered a rectangle, This is simply not true.

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## How do you prove a parallelogram is a square?

The only parallelogram that satisfies that description is a square. Theorem 16.8: If the diagonals of a parallelogram are congruent and perpendicular, the parallelogram is a square.

## Does a parallelogram have four right angles?

Rectangle: A parallelogram with 4 right angles.

## Is a square always a parallelogram?

This is always true. Squares are quadrilaterals with 4 congruent sides and 4 right angles, and they also have two sets of parallel sides. Parallelograms are quadrilaterals with two sets of parallel sides. Since squares must be quadrilaterals with two sets of parallel sides, then all squares are parallelograms.

## Why is a rhombus not a rectangle?

A rhombus is defined as a parallelogram with four equal sides. Is a rhombus always a rectangle? No, because a rhombus does not have to have 4 right angles. Kites have two pairs of adjacent sides that are equal.

## Is every rectangle a rhombus?

1 Answer. No, every rectangle is not a rhombus.

## Is a square a rhombus yes or no?

A square is a special case of a rhombus, because it has four equal-length sides and goes above and beyond that to also have four right angles. Every square you see will be a rhombus, but not every rhombus you meet will be a square.

## How do you identify a parallelogram?

To identify a parallelogram, the shape has to meet one of the following criteria:

1. It has two pairs of parallel opposite sides.
2. It has two pairs of equal opposite angles.
3. It has two pairs of equal and parallel opposite sides.
4. Its diagonals bisect each other.

## What is the formula of diagonal of parallelogram?

Find the diagonal of a parallelogram with sides 3 cm, 5 cm and angle 45 degrees? Diagonal of parallelogram = 3.576 cm.

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