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Burka [1]
3 years ago
6

Is anyone able to give a step by step process to this?

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
8 0

Answer:

The value of y is 3 cm.

Step-by-step explanation:

Given,

Perimeter of triangle = 29\ cm

Solution,

Lets redraw the triangle with nomenclature ABC, given in the attachment.

∴P(ΔABC) = 29 cm  (P stands for perimeter)

Length of AB = y+9

Length of BC = 2y

Length of CA = 4y-1

Now, we all know that the perimeter of a triangle is sum of all the three sides of triangle.

P(ΔABC) = Length of AB+Length of BC+Length of CA

On substituting the values, we get;

(y+9)+2y+(4y-1)=29\\y+2y+4y+9-1=29\\7y+8=29\\7y=29-8\\7y=21\\y=\frac{21}{7} =3\ cm

Length of AB =y+9=3+9=12\ cm

Length of BC =2y=2\times3=6\ cm

Length of CA =4y-1=4\times3-1=12-1=11\ cm

Hence the value of y is 3 cm.

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