The perimeter of a right triangle is 40 cm, and its hypotenuse measures 17cm. Find the length of each leg.Show the work that leads to your conclusion.
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Respuesta :

Answer:

8cm and 15cm

Step-by-step explanation:

Answer:

8 cm and 15 cm.

Step-by-step explanation:

Let x and y represent length of each leg of right triangle.

We have been given that the perimeter of a right triangle is 40 cm, and its hypotenuse measures 17 cm.

We can represent this information in a system of equations as:

[tex]x+y+17=40...(1)[/tex]

[tex]x^2+y^2=17^2...(2)[/tex]

From equation (1), we will get:

[tex]x+y+17-17=40-17[/tex]

[tex]x+y=23[/tex]

[tex]x=23-y[/tex]

Substitute this value in equation (2):

[tex](23-y)^2+y^2=17^2[/tex]

[tex]529-46y+2y^2=289[/tex]

[tex]2y^2-46y+529=289[/tex]

[tex]2y^2-46y+240=0[/tex]

[tex]y^2-23y+120=0[/tex]

[tex]y^2-15y-8y+120=0[/tex]

[tex]y(y-15)-8(y-15)=0[/tex]

[tex](y-15)(y-8)=0[/tex]

[tex]y=15\text{ (or) }y=8[/tex]

Therefore, the length of the legs of the hypotenuse would be 8 cm and 15 feet.

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