Calculate the perimeter of an equilateral triangle with a side of 7 dm.
| June 1, 2021 | education
Formula for finding the perimeter of an equilateral triangle:
P = a + a + a or P = 3 × a.
We know that all sides of an equilateral triangle are equal.
From the condition, we know that the side of the triangle is 7 dm. This means that all sides are equal to 7 dm.
P = 7 dm + 7 dm + 7 dm = 21 dm.
P = 3 × 7 dm = 21 dm.
Answer: P = 21 dm.
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