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In triangle JKL, if JK = 15 cm, KL = 20 cm, and JL = 25 cm, what is the semi-per

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Question: In triangle JKL, if JK = 15 cm, KL = 20 cm, and JL = 25 cm, what is the semi-perimeter? (2022)

Options:

  1. 30 cm
  2. 25 cm
  3. 20 cm
  4. 15 cm

Correct Answer: 30 cm

Exam Year: 2022

Solution: 

Semi-perimeter = (JK + KL + JL) / 2 = (15 + 20 + 25) / 2 = 30 cm.

In triangle JKL, if JK = 15 cm, KL = 20 cm, and JL = 25 cm, what is the semi-per

Practice Questions

Q1
In triangle JKL, if JK = 15 cm, KL = 20 cm, and JL = 25 cm, what is the semi-perimeter? (2022)
  1. 30 cm
  2. 25 cm
  3. 20 cm
  4. 15 cm

Questions & Step-by-Step Solutions

In triangle JKL, if JK = 15 cm, KL = 20 cm, and JL = 25 cm, what is the semi-perimeter? (2022)
  • Step 1: Identify the lengths of the sides of triangle JKL. They are JK = 15 cm, KL = 20 cm, and JL = 25 cm.
  • Step 2: Add the lengths of all three sides together: 15 cm + 20 cm + 25 cm.
  • Step 3: Calculate the total: 15 + 20 = 35, then 35 + 25 = 60 cm.
  • Step 4: Divide the total by 2 to find the semi-perimeter: 60 cm / 2.
  • Step 5: Calculate the result: 60 / 2 = 30 cm.
  • Triangle Properties – Understanding the properties of triangles, including the calculation of the semi-perimeter.
  • Perimeter Calculation – Ability to sum the lengths of the sides of a triangle and divide by two to find the semi-perimeter.
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