Question: The perimeter of an isosceles triangle is 36 cm, and the base is 12 cm. What is the length of one of the equal sides?
A) 8 cm
B) 10 cm
C) 12 cm
D) 14 cm
Solution:
Let the length of one of the equal sides be x.
The perimeter is the sum of all sides:
Perimeter=x+x+12=36
2x+12=36 ⇒ 2x=24 ⇒ x=12 cm
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