Question

Construct a triangle ABC whose perimeter is 12cm and side are in the ratio 3:4:5

Answer 1

hi
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$\bold{let's \: first \: find \: the \: sides}$
perimeter = 12cm

let first side = 3x
second side = 4x
third side = 5x

$\underline{ \bold{perimeter \: = sum \: of \: all \:sides }}$

perimeter = 3x + 4x + 5x

$12 = 12x \\ x = 1$

$\bold{so \: sides \: are \: 3cm \: 4cm \: 5cm}$
$\huge{refer \: to \: pic......}$

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$\blue{hope \: it \: helps}$

Answer 2

Step-by-step explanation:

1. let first side=12cm

• second side=4x
• third side=5x
• perimeter =sum of all side
• peimeter=3x+4x+5x=12x
• perimeter=12=12x
• x=12/12
• x=1
• so the three side of triangle is 3,4,5