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For a triangle with side lengths a, b, and c, what formula gives its perimeter?
AP = a * b * c
BP = a + b + c
CP = 0.5 * a * b
DP = 2a + 2b
Answer & Solution
Correct answer: B. P = a + b + c
1. Perimeter is defined as the total length around the boundary of a figure.
2. For a triangle, that boundary is made of exactly three sides, a, b, and c.
3. Adding those three side lengths together gives the formula P equals a plus b plus c.
_Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 3 "Math Models", section 3.4 Solve Geometry Applications: Triangles, Rectangles, and the Pythagorean Theorem_
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