# Is rectangle a parallelogram prove or disprove?

## Is rectangle a parallelogram prove or disprove?

There are 5 different ways to prove that this shape is a parallelogram. Choose one of the methods. – Show that both pairs of opposite sides are congruent. – Show that both pairs of opposite sides are parallel….Prove it is a Rectangle.

Statements Reasons
AC ≅ BD CPCTC

### Is it true that parallelogram is a rectangle?

A parallelogram is a rectangle. This is sometimes true. Â It is true when the parallelogram has 4 right angles.

Which of these properties is enough to prove that a given parallelogram is also a rectangle?

THEOREM Converse: If a parallelogram has congruent diagonals, it is a rectangle. the figure joining, in order, the midpoints of the sides of a rectangle is a rhombus, and the figure joining, in order, the midpoints of the sides of a rhombus is a rectangle. A rhombus is a parallelogram with four congruent sides.

Why is every rectangle a parallelogram?

A parallelogram is a quadrilateral with 2 pairs of parallel sides. The opposite sides on every rectangle are parallel, so every rectangle is a parallelogram. 8.

## What condition will make parallelogram ABCD a rectangle?

A rectangle is a parallelogram with all four angles being right angles. In a parallelogram, if one angle is a right angle, then all four angles are right (why?). ABCD is a rectangle. Theorem: The two diagonals of a rectangle are congruent.

### How do you determine whether a parallelogram is a rectangle?

If the diagonals of a parallelogram are congruent, then it’s a rectangle (neither the reverse of the definition nor the converse of a property). If a parallelogram contains a right angle, then it’s a rectangle (neither the reverse of the definition nor the converse of a property).

How do you prove it is a rectangle?

There are several easy ways to prove it is a rectangle.

1. Show that all angles are 90 degrees.
2. Show that one set of sides is parallel ,and that two opposite angles are 90 degrees.
3. Show that the diagonals bisect each other, and that they are equal in length.

How is a rectangle a parallelogram?

The vertices join the adjacent sides at 90° angles, which means the opposite sides of the rectangle are parallel lines. Since it has two sets of parallel sides and two pairs of opposite sides that are congruent, a rectangle has all of the properties of a parallelogram. That’s why a rectangle is always a parallelogram.

## What condition makes parallelogram math a rectangle?

Theorem 16.5: If the diagonals of a parallelogram are congruent, then the parallelogram is a rectangle.

### How do you prove that it is a rectangle?

How are rectangle and parallelogram related?

The opposite internal angles of both a parallelogram and rectangle are equivalent. The main difference is that a rectangle always has angles of 90°, while that of a parallelogram may vary. In other words, the angles of a rectangle are always equal, or equiangular.

Why are all parallelograms not rectangles?

A rectangle is considered a special case of a parallelogram because: 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.