Question

12. The sides of triangle are x cm , x+3 cm and x+5 cm . If the perimeter of the triangle is 29 cm the
-the smallest side of the triangle:
13.ਕਿਸੇ ਤ੍ਰਿਭੁਜ ਦੀਆਂ ਭੁਜਾਵਾਂ ਕ੍ਰਮ ਵਾਰ X cm , x+3 cm ਅਤੇ x+5 cm ਹਨ । ਜੇਕਰ ਤ੍ਰਿਭੁਜ ਦਾ ਪਰਿਮਾਪ 29 ਸਮ ਹੋਰ
ਸਭ ਤੋਂ ਛੋਟੀ ਭੁਜਾ ਦੀ ਲੰਬਾਈ ਪਤਾ ਕਰੋ।
a) 4 b) 7
c) 6
d) 5
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Answer 1

Answer:

side of triangle is

x

x+3

&

x+5

perimeter of triangle=29

we know that the sum of all three side of a triangle is perimeter.

so, x+x+3+x+5=29

3x+8=29

3x=29-8

x=21/3

x=7 smallest side of triangle

Answer 2

Sides = x, x+3, x+5
Perimeter = side + side + side= 29cm
Therefore, perimeter of triangle
=> x+ (x+3)+( x+5) = 29cm
=> x+ x+3 +x+5 = 29cm
=> 3x + 8 = 29
=> 3x=29-8
=> 3x=21
=> x = 21/3
Therefore, x = 7cm
Smallest side of the triangle = x = 7cm