Practice Trigonometric formula - 9.2 | 1. Properties of Triangles | (IB) Class 10 Mathematics – Group 5, Geometry & Trigonometry
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Practice Questions

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Question 1

Easy

Using the formula, find the area of a triangle with sides 4 and 5, and an included angle of 90°.

💡 Hint: Use sin(90°) which equals 1.

Question 2

Easy

Calculate the area of a triangle with a base of 10 and height of 5.

💡 Hint: Use the basic area formula.

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Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What does the 'C' in the area formula Area = 1/2 * a * b * sin(C) represent?

💡 Hint: Think about the components of a triangle.

Question 2

True or False: Heron's formula can be used without knowing any angles.

  • True
  • False

💡 Hint: Focus on what information Heron’s formula needs.

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Challenge Problems

Push your limits with challenges.

Question 1

A triangle has sides of length 10, 24, and an included angle of 60°. Calculate the area using the trigonometric formula.

💡 Hint: Remember to calculate sin(60°) first.

Question 2

Calculate the area of a triangle with sides 7, 8, and 9 using Heron’s formula. How does this compare to using the trigonometric formula?

💡 Hint: Start with the semi-perimeter for Heron's formula.

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