Math, asked by karunapaunikar12, 11 months ago

The sides of a triangle are 3:4:5 and the perimeter is 84 cm. Find the area of triangle??

Answers

Answered by Anonymous

$\huge{Answer \ :-}$

Let sides of Triangle are 3x , 4x , 5x.

Perimeter of Triangle = Sum of all sides

3x + 4x + 5x = 84 cm

12x = 84

x = 7

So, 1st angle = 3 × 7 = 21 cm

2nd angle = 4 × 7 = 28 cm

3rd angle = 5 × 7 = 35 cm

Area of Triangle = $\dfrac{1}{2}$ × base × height

= $\dfrac{1}{2}$ × 21 × 28 = 294

$area \: = 294 \: {cm}^{2}$

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Thanks !!

karunapaunikar12: Why did you have taken 28 as height

pavanmeena16200366: how u know this is right angle triangle

pavanmeena16200366: then hoe u take heoght

Answered by pavanmeena16200366

Answer:

3x+4x+5x=84

12x=84

x=7

Step-by-step explanation:

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