Mathematics
Grade9
Easy
Question
The pool shown is a right triangle with legs of length 40 feet and 41 feet. The path around the pool is 40 inches wide. In the diagram, triangle PQR is similar to triangle STU, and the scale factor of the two triangles is 1.3 : 1. Find the perimeter of triangle PQR.
- 179
- 181
- 165
- 135
Hint:
Scale Factor = Ratio of perimeters
The correct answer is: 179
Scale Factor = Ratio of perimeters (large : small)
Perimeter of STU = 40 + 41 + 57 = 138 feet (use Pythagoras theorem to find UT)
x= 179 feet (Triangle PQR)
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