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The perimeter of a triangle is 240. Its sides are proportional to 3:4:5. The largest side of the triangle is ?

The perimeter of a triangle is 240. Its sides are proportional to 3:4:5. The largest side of the triangle is ?
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The perimeter of a triangle is 240. Its sides are proportional to 3:4:5. The largest side of the triangle is ?

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User Rohanpm
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8.2k points

1 Answer

2 votes
If the sides are proportional you can use the formula:

3x + 4x + 5x = 240 and solve for x.

which is: 12x = 240
x = 20

The longest side is 5x, so the longest side is 100.
answered
User Herman Lintvelt
by
8.6k points
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