If the ratio of the sides of a triangle is 3:4:5, what is the perimeter if the s

Practice Questions

Q1
If the ratio of the sides of a triangle is 3:4:5, what is the perimeter if the shortest side is 6 cm? (2021)
  1. 30 cm
  2. 36 cm
  3. 42 cm
  4. 48 cm

Questions & Step-by-Step Solutions

If the ratio of the sides of a triangle is 3:4:5, what is the perimeter if the shortest side is 6 cm? (2021)
  • Step 1: Identify the ratio of the sides of the triangle, which is 3:4:5.
  • Step 2: Understand that the shortest side corresponds to the '3' in the ratio.
  • Step 3: Since the shortest side is given as 6 cm, we can set up a relationship: 3 parts = 6 cm.
  • Step 4: To find the value of one part, divide 6 cm by 3: 6 cm / 3 = 2 cm per part.
  • Step 5: Now, calculate the lengths of the other sides using the ratio: 4 parts = 4 * 2 cm = 8 cm and 5 parts = 5 * 2 cm = 10 cm.
  • Step 6: The lengths of the sides are 6 cm, 8 cm, and 10 cm.
  • Step 7: To find the perimeter, add all the sides together: 6 cm + 8 cm + 10 cm = 24 cm.
  • Ratio and Proportion – Understanding how to apply ratios to find the lengths of sides in a triangle based on a given shortest side.
  • Perimeter Calculation – Calculating the perimeter of a triangle by summing the lengths of its sides.
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