**Rectangle = Flat Shape with Four Sides (with four right angles)**

Basics

l = Length

w = Width

P = Perimeter = distance along sides of rectangle

A = Area = area covering surface of rectangle (measured in square units)

Right Angle = 90°

A rectangle has four right angles.

The opposite sides of a rectangle are parallel.

A rectangle is a special form of a parallelogram in which all angles are right angles.

Formulas (** Mathematics Formula Sheet**)

P = 2l + 2w

A = lw

**
Formulas (NOT on Mathematics Formula Sheet)
**l =

w =

l = A ÷ w

w = A ÷ l

**
Question
**A football field is 120 yards long and 53 yards wide. What is its perimeter?

**Answer
**346 yards

**Answer Process**

P = 2l + 2w

P = 2 × 120 + 2 × 53 = 346

Input |
Display |
Comment |

blinker | clears screen | |

2 × 120 + 2 × 53 | 2*120+2*53 | P = 2l + 2w |

346 | Answer | |

## Rectangle |

**
Question
**A football field is 120 yards long and 53 yards wide. What is its area?

**Answer
**6360 square yards

**Answer Process**

A = lw

A = 120 × 53 = 6360

Input |
Display |
Comment |

blinker | clears screen | |

120 × 53 | 120*53 | A = lw |

6360 | Answer | |

## Rectangle |

**Question**

The perimeter of a rectangular ping pong table is 8.5 meters. Its width is 1.5 meters. What is its length?

**Answer
**2.75 meters

**Answer Process**

l =

l = = 2.75

Input |
Display |
Comment |

blinker | clears screen | |

8.5-2×1.5 2 |
l = | |

2.75 | Answer | |

## Rectangle |

**Question**

The perimeter of a rectangular candy bar is 14 centimeters. Its length is 5 centimeters. What is its width?

**Answer
**2 centimeters

**Answer Process**

w =

w = = 2

Input |
Display |
Comment |

blinker | clears screen | |

14-2×5 2 |
w = | |

2 | Answer | |

## Rectangle |

**
Question
**The area of a rectangular room is 108 square feet. Its width is 9 feet. What is its length?

**Answer
**12 feet

**Answer Process**

l = A ÷ w

l = 108 ÷ 9 = 12

Input |
Display |
Comment |

blinker | clears screen | |

108 ÷ 9 | 108÷9 | l = A ÷ w |

12 | Answer | |

## Rectangle |

**Question**

The area of a rectangular room is 156 square feet. Its length is 13 feet. What is its width?

**Answer
**12 feet

**Answer Process**

w = A ÷ l

w = 156 ÷ 13 = 12

Input |
Display |
Comment |

blinker | clears screen | |

156 ÷ 13 | 156÷13 | w = A ÷ l |

12 | Answer | |

## Rectangle |

**
Question
**The area of a rectangular postage stamp is 9.72 square centimeters. Its width is 2.7 centimeters. What is its perimeter?

**Answer
**12.6 centimeters

**Answer Process**

l = A ÷ w

l = 9.72 ÷ 2.7 = 3.6

P = 2l + 2w

P = 2 × 3.6 + 2 × 2.7 = 12.6

Input |
Display |
Comment |

blinker | clears screen | |

9.72 ÷ 2.7 | 9.72÷2.7 | l = A ÷ w |

3.6 | l | |

2 × 3.6 + 2 × 2.7 | 2*3.6+2*2.7 | P = 2l + 2w |

12.6 | Answer | |

## Rectangle |

**Question**

The area of a rectangular postage stamp is 10.92 square centimeters. Its length is 3.9 centimeters. What is its perimeter?

**Answer
**13.4 centimeters

**Answer Process**

w = A ÷ l

w = 10.92 ÷ 3.9 = 2.8

P = 2l + 2w

P = 2 × 3.9 + 2 × 2.8 = 13.4

Input |
Display |
Comment |

blinker | clears screen | |

10.92 ÷ 3.9 | 10.92÷3.9 | w = A ÷ l |

2.8 | w | |

2 × 3.9 + 2 × 2.8 | 2*3.9+2*2.8 | P = 2l + 2w |

13.4 | Answer | |

## Rectangle |

**
Question
**The perimeter of a rectangular postage stamp is 20 centimeters. Its width is 3 centimeters. What is its area?

**Answer
**21 square centimeters

**Answer Process
**l =

l = = 7

A = lw

A = 7 × 3 = 21

Input |
Display |
Comment |

blinker | clears screen | |

20-2×3 2 |
l = | |

7 | l | |

7 × 3 | 7*3 | A = lw |

21 | Answer | |

## Rectangle |

**
Question
**The perimeter of a rectangular postage stamp is 24 centimeters. Its length is 8 centimeters. What is its area?

**Answer
**32 square centimeters

**Answer Process
**w =

w = = 4

A = lw

A = 8 × 4 = 32

Input |
Display |
Comment |

blinker | clears screen | |

24-2×8 2 |
w = | |

4 | w | |

8 × 4 | 8*4 | A = lw |

32 | Answer | |

## Rectangle |

**
Practice – Questions
**1. A park is 525 yards long and 125 yards wide. What is its perimeter?

2. A park is 525 yards long and 125 yards wide. What is its area?

3. The perimeter of a large rectangular table is 12.5 meters. Its width is 3.5 meters. What is its length?

4. The perimeter of a large rectangular candy bar is 22 centimeters. Its length is 7 centimeters. What is its width?

5. The area of a rectangular room is 88 square feet. Its width is 8 feet. What is its length?

6. The area of a rectangular room is 132 square feet. Its length is 12 feet. What is its width?

7. The area of a rectangular tile is 35 square inches. Its width is 5 inches. What is its perimeter?

8. The area of a rectangular tile is 64.66 square inches. Its length is 12.2 inches. What is its perimeter?

9. The perimeter of a rectangular tile is 40 inches. Its width is 8 inches. What is its area?

10. The perimeter of a large rectangular tile is 107.5 inches. Its length is 12.5 inches. What is its area?

**
Practice – Answers
**1. 1300 yards

2. 65625 square yards

3. 2.75 meters

4. 4 centimeters

5. 11 feet

6. 11 feet

7. 24 inches

8. 35 inches

9. 96 square inches

10. 515.625 square inches