- A7
- B5
- C6
- D8
Step-by-Step Solution
List sides a ≤ b ≤ c with a + b + c = 15 and a + b > c (so c ≤ 7): (1, 7, 7), (2, 6, 7), (3, 5, 7), (3, 6, 6), (4, 4, 7), (4, 5, 6), (5, 5, 5). That makes 7.
Answer: A) 7
How many different triangles with whole-number side lengths (in cm) have a perimeter of 15 cm?
Competition practiceGeometry
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Geometry practice questions
More Geometry practice
In triangle ABC, DE ∥ BC with D on AB and E on AC. The area of triangle ADE is 25 cm²…The area of triangle ABC is 60 cm². D lies on BC with BD : DC = 2 : 3, and E is the…Two vertical poles of heights 6 m and 11 m stand on level ground 12 m apart. What is the…Which of the following is NOT a valid test for the congruence of two triangles?A right-angled triangle has a perimeter of 30 cm and an area of 30 cm². What is the…