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8_murik_8 [283]
3 years ago
12

The first side of a triangle is 9 meters shorter than the second side. The third side is 3 times as long as the first side. The

perimeter is 39 meters. Find the length of the longest side.
Mathematics
1 answer:
Alex73 [517]3 years ago
7 0

Answer:

The longest sides is 18 m long.

Step-by-step explanation:

Let x meters be the length of the first side.

The length of the second side = x+9 m.

The length of the third = 3x m.

Perimeter = x + 3x + x + 9 = 39

5x + 9 = 39

5x = 30

x = 6 m.

The other 2 sides are  6+9 = 15 m and 3*6 = 18 m.

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Ksju [112]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

1. Find Angle A :

  • x  + 24 = 3x

  • 3x - x =   2 4

  • 2x = 24

  • x = 12

Angle A :

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  • 3 \times 12

  • 36 \degree

2. Find Angle B :

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Angle B :

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  • (10 \times 9) - 27

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Find Angle C :

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Angle C :

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Find Angle D :

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  • x = 18

Angle D :

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  • 72 + 39

  • 111\degree

And it's given :

  • 36° = Angle A = B

  • 63° = Angle B = A

  • 71° = Angle C = H

  • 111° = Angle D = E

Therefore, the answer will be " BAHE "

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3 years ago
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