Long Division

Rectangle

A rectangle is a quadrilateral parallelogram shape with 4 right angles.

Rect - right and straight (Latin)

Rectify - to straighten out a problem; to make something right

|_ is a right angle because the lines end at a common point, a corner,

called a vertex;

the | vertical | lines are straight and upright.

and the ___ horizontal ___ lines are straight.

quadrilateral

Quadri - 4 + Lateral - side

A square is a special rectangle with 4 equal sides.

Length or Height by (x) Width = Area

Rectangle Explains Long Division

Describe each rectangle 4 ways:

(1) as a multiplication equation

1 vertical side x 1 horizontal side = 1 area

1 x 1 = 1

(2) as a long division problem

1

1 厂1

(3) as a division equation

1 ÷ 1 = 1

(4) as a spoken or written sentence:

A rectangle that is one unit high by one unit wide, has an area containing one unit.

Describe each rectangle 5 ways:

(1) as a multiplication equation

1 vertical side x 2 horizontal side = 2 area

1 x 2 = 2

(2) as a long division problem

2

1 厂2

(3) as a division equation

2 ÷ 1 = 2

(4) as a spoken or written sentence:

A rectangle that is one unit high by two units wide, has an area containing two units.

(5) perimeter

The perimeter (boundary measure) of a 1 by 2 rectangle is the sum of the measurement of its sides: 1 + 1 + 2 + 2 = 6

2(1) + 2(2) = 6

2(1 + 2) = 6 --> 2 + 4 = 6

Perimeter

In a rectangle, the perimeter is the length of two vertical sides + two horizontal sides (the measure of the distance around the edge of the shape).

perimeter =

boundary measure

periphery =

boundary area