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What is the perimeter of triangle PQR?

 

 Oct 1, 2020
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The two sides of the two triangles PQR and STU are similar, that is, 6 and 4, which means that their 3rd side must also be similar. So, you equate the 3rd sides:

 

(3y - 2) = (y + 4), solve for y

3y - y =4 + 2

2y = 6

y = 3.  Now, you must substitute this value of y into the 3rd side of PQR:

3y - 2 =3*3 - 2 = 7 ft - which is the 3rd side of PQR.

 

Then, Perimeter of PQR = 6 + 4 + 7 = 17 feet.

 Oct 1, 2020

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