In an isosceles triangle, the side is 4.2 cm and the base is 0.3 cm less. Find the perimeter of this triangle.

univerkov | December 1, 2020 | education

First, let’s find what the base is equal to:
4.2-0.3 = 3.9
The perimeter is the sum of all sides:
4.2 + 4.2 + 3.9 = 12.3.
Answer: 12.3cm

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