Mandy has a garden that is shaped like a right triangle, as shown below. To determine how much fencing to buy to enclose her o

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问题 Mandy has a garden that is shaped like a right triangle, as shown below.

To determine how much fencing to buy to enclose her original garden, Mandy calculates the garden’s perimeter. What is the perimeter, in feet?

选项 A、60
B、108
C、132
D、144
E、168

答案D

解析 The correct answer is D. The perimeter is the distance around the garden, so you must calculate the length of the hypotenuse, using the Pythagorean Theorem:
a²+b² = c²
36²+48²= c²
1,296 + 2,304 = c²
3,600 = c²
60 = c
Now, simply add the sides: 36+48 + 60 = 144.

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本试题收录于： GRE QUANTITATIVE题库GRE分类

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