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the perimeter of the composite figure made up of 2 triangles is 14

which expression can be used to find the perimeter of the composite figure made up of triangles.


Sagot :

Using a linear function, it is found that the expression to find the perimeter of the composite figure made up of t triangles is:

  • [tex]P(t) = 2t + 10[/tex]

What is a linear function?

A linear function is modeled by:

[tex]y = mx + b[/tex]

In which:

  • m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
  • b is the y-intercept, which is the value of y when x = 0.

What is the perimeter of a figure?

  • The perimeter of a figure is the sum of all it's outside dimensions.

Researching the problem on the internet, it is found that:

  • When the figure is made of 1 triangle, the perimeter is of 12, as it is an isosceles triangle with two dimensions of 5 and one dimension of 2.
  • When the figure is made of 2 triangles, the perimeter is of 14. For 3 triangles, it is of 16, and so on...

  • Hence, when the number of triangles changes by 1, the perimeter changes by 2, which means that the slope is [tex]m = 2[/tex], and the equation is:

[tex]P(t) = 2t + b[/tex]

When t = 1, P(t) = 12, hence, we can find b:

[tex]12 = 2 + b[/tex]

[tex]b = 10[/tex]

Hence, the expression is:

[tex]P(t) = 2t + 10[/tex]

To learn more about linear function, you can take a look at https://brainly.com/question/25823744