Rectangles #7-3

Front

What is a rectangle?

Back

A rectangle is a quadrilateral with four right angles and opposite sides that are equal in length.

Front

What are the properties of a rectangle?

Back

1. Opposite sides are equal in length. 2. All angles are 90 degrees. 3. Diagonals are equal in length.

Front

Which angles are congruent in a rectangle?

Back

All four angles are congruent, each measuring 90 degrees.

Front

What is the relationship between the diagonals of a rectangle?

Back

The diagonals of a rectangle are equal in length and bisect each other.

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

If one side of a rectangle is 5 cm and the other is 10 cm, what is the area?

Back

Area = 5 cm × 10 cm = 50 cm².

Front

If the length of a rectangle is doubled, what happens to the area?

Back

The area is also doubled.

Front

If the width of a rectangle is halved, what happens to the perimeter?

Back

The perimeter decreases, as it is calculated using both length and width.

Front

What is the value of x if the length is 8 cm and the width is x cm, and the area is 32 cm²?

Back

x = 4 cm.