Answer
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Step 1We are given the lengths of the three sides of triangle ABC as follows:
c = 7 \space \text{cm}
The perimeter of a triangle is the sum of the lengths of its sides. Therefore, to find the perimeter of triangle ABC, we need to add the lengths of sides a, b, and c.
Step 2: Calculate the sum of the lengths of sides a, b, and c.
a + b + c = 5 \space \text{cm} + 6 \space \text{cm} + 7 \space \text{cm} = 18 \space \text{cm}
Final Answer
The perimeter of triangle ABC is 18 cm.
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