3. If sides
of the triangle are in the
ratio 6:4:5 and its perimeter is
90 on then find the area?
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3. If sides
of the triangle are in the
ratio 6:4:5 and its perimeter is
90 on then find the area?
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Answer: 357.17 unit sq.
Step-by-step explanation:Since the ratio is 6:4:5 , let the sides be 6x , 4x and 5x .
therefore, 6x + 4x + 5x = 90
15x = 90
x = 90÷15
x = 6
sides are 36 , 24 and 30
after finding the sides we will find the area by using the heron's formula
area = √s(s-a)(s-b)(s-c)
where s = perimeter/2
area = √(45)(45-36)(45-24)(45-30)
= √45×9×21×15
= 45×3√7
= 135×2.645
= 357.17