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The lengths of the three sides of a triangle are in the ratio of 2 : 2 : 3. If the perimeter of the triangle is 42 cm, then what is the length of the largest side? |
12 cm 18 cm 20 cm 15 cm |
18 cm |
Let the sides be 2a, 2a, and 3a 2a + 2a + 3a = 42 = 7a = 42 = a = 6 So, the length of the largest side = 6 × 3 = 18 cm |
