IGCSE Class 9 > Class 9 Videos > Year 9 Mathematics (Cambridge) > Area and Perimeter: Triangle
Area and Perimeter Triangle Video Lecture - Year 9 IGCSE (Cambridge) -
FAQs on Area and Perimeter: Triangle
| 1. What is the formula to calculate the area of a triangle? |  |
Ans. The formula to calculate the area of a triangle is (base x height) / 2.
| 2. How do you find the perimeter of a triangle? | |
Ans. To find the perimeter of a triangle, you simply add up the lengths of all three sides.
| 3. Can you calculate the area of a triangle if you only know the lengths of the sides? | |
Ans. No, you need to know at least the base and height, or two sides and the included angle, to calculate the area of a triangle.
| 4. How can you find the height of a triangle if it is not given? | |
Ans. You can use trigonometry to find the height of a triangle by using one of the angles and the length of one side.
| 5. Is the perimeter of a triangle equivalent to the sum of the lengths of its sides? | |
Ans. Yes, the perimeter of a triangle is indeed the sum of the lengths of its three sides.
About this Video
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Apr 20, 2026 Last updated
Video Description: Area and Perimeter: Triangle for Class 9 2026 is part of Year 9 Mathematics IGCSE (Cambridge) preparation. The notes and questions for Area and Perimeter: Triangle have been prepared according to the Class 9 exam syllabus. Information about Area and Perimeter: Triangle covers all important topics for Class 9 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Area and Perimeter: Triangle.
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