1. Calculate the perimeter of the given shapes by using the formulae for a square and a rectangle.
Answers
Step-by-step explanation:
(a) Perimeter of square shaped window= 4×side
= 4×135
= 540 cm
(b) Perimeter of rectangular blackboard= 2(l+b)
= 2(4+3)
= 2×7
= 14 m
= 1400 cm
(c) Perimeter of rectangular book= 2(l+b)
= 2(14+13)
= 2×27
= 54 cm
(d) Perimeter of rectangular tv screen = 2(l+b)
= 2(80+41)
= 2× 121
= 242 cm
Hence, Blackboard has the largest perimeter.
Answer:
☞︎︎︎ PERIMETER :
THE PERIMETER IS THE BOUNDARY THAT ENCLOSES AREA .
☞︎︎ REQUIRED FORMULAS :
➪ PERIMETER OF A SQUARE = 4 × L
➪ PERIMETER OF A RECTANGLE =2
( L + B )
➜ WINDOW :
THE SIZE OF IT'S BREATH AND LENGTH IS EQUAL SO WE SHALL CONSIDER THIS FIGURE AS A SQUARE .
L OF A WINDOW = 135 cm
B OF A WINDOW = 135 cm
PERIMETER = 4 × L
= 4 × 135
= 540 cm
◇───────◇───────◇
➜ BLACK BOARD :
THE SIZE OF IT'S BREATH AND LENGTH NOT IS EQUAL SO WE SHALL CONSIDER THIS FIGURE AS A RECTANGLE .
L OF A BLACK BOARD = 4 m
B OF A BLACK BOARD = 3 m
PERIMETER = 2 ( l + b )
= 2 ( 3 + 4 )
= 2 × 7
= 14 cm
◇───────◇───────◇
➜ BOOK :
THE SIZE OF IT'S BREATH AND LENGTH NOT IS EQUAL SO WE SHALL CONSIDER THIS FIGURE AS A RECTANGLE .
L OF A BOOK = 14 cm
B OF A BOOK = 13 cm
PERIMETER = 2 ( l + b )
= 2 ( 14 + 13 )
= 2 × 27
= 54 cm
◇───────◇───────◇
➜ TELEVISION :
THE SIZE OF IT'S BREATH AND LENGTH NOT IS EQUAL SO WE SHALL CONSIDER THIS FIGURE AS A RECTANGLE .
L OF A TV = 80 cm
B OF A TV = 41 cm
PERIMETER = 2 ( l + b )
= 2 ( 80 + 40 )
= 2 × 120
= 240 cm
◇───────◇───────◇
HENCE ; VERIFIED THAT THE WINDOW HAS THE LARGEST PERIMETER
◇───────◇───────◇
☞︎︎︎ AS WE KNOW THAT :
➦ L = LENGTH
➦ B = BREATH
➦ P = PERIMETER
◇◇◇◇◇◇◇◇◇
- HOPE THIS WILL HELP YOU ✔︎ : )