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erastova [34]
2 years ago
15

Just help me plssssssssss

Mathematics
1 answer:
Komok [63]2 years ago
7 0

Answer:

The perimeter of triangle is 30ft.

Step-by-step explanation:

First you have to find the value of a using Pythogoras Theorem, a² + b² = c² where a and b is the sides and c is the hypotenuse :

{a}^{2}  +  {b}^{2} =   {c}^{2}

{a}^{2}  =  {c}^{2}  -  {b}^{2}

a =  \sqrt{ {c}^{2} -  {b}^{2}  }

Let b = 12,

Let c = 13,

a =  \sqrt{ {13}^{2} - 12 {?}^{2}  }

a =  \sqrt{25}

a = 5feet

Next you have to find the perimeter of triangle by adding all the sides together :

perimeter = 5 + 12 + 13

perimeter = 30feet

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