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What is the semi-perimeter of a triangle with sides 7 cm, 8 cm, and 9 cm?

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Question: What is the semi-perimeter of a triangle with sides 7 cm, 8 cm, and 9 cm?

Options:

  1. 12 cm
  2. 14 cm
  3. 16 cm
  4. 18 cm

Correct Answer: 14 cm

Solution: 

Semi-perimeter = (7 + 8 + 9) / 2 = 24 / 2 = 12 cm.

What is the semi-perimeter of a triangle with sides 7 cm, 8 cm, and 9 cm?

Practice Questions

Q1
What is the semi-perimeter of a triangle with sides 7 cm, 8 cm, and 9 cm?
  1. 12 cm
  2. 14 cm
  3. 16 cm
  4. 18 cm

Questions & Step-by-Step Solutions

What is the semi-perimeter of a triangle with sides 7 cm, 8 cm, and 9 cm?
  • Step 1: Identify the lengths of the sides of the triangle. The sides are 7 cm, 8 cm, and 9 cm.
  • Step 2: Add the lengths of the sides together. Calculate 7 + 8 + 9.
  • Step 3: Perform the addition. 7 + 8 = 15, then 15 + 9 = 24.
  • Step 4: Divide the total by 2 to find the semi-perimeter. Calculate 24 / 2.
  • Step 5: Perform the division. 24 divided by 2 equals 12.
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