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Answer: ASet 1: Triangles (Beginner)
Explanation
PROBLEM
A triangle has sides 5, 7, and 8. What is its perimeter?
A triangle has sides 5, 7, and 8. What is its perimeter?
A.✓ Correct
20
B.
23
C.
21
D.
19
Detailed Explanation
Choice A is the best answer. Perimeter = 5 + 7 + 8 = 20
Why others are wrong:
B: 23 is incorrect because it does not satisfy the equation.
C: 21 is incorrect because it does not satisfy the equation.
D: 19 is incorrect because it does not satisfy the equation.