Using the Sine Rule to Calculate the Area of Triangles and Quadrilaterals

Using the Sine Rule to Calculate the Area of Triangles and Quadrilaterals

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial covers the concept of area, focusing on calculating the area of triangles and quadrilaterals. It begins with a basic explanation of area as the space within a 2D shape, typically calculated by multiplying two side lengths. The tutorial then addresses more complex scenarios where one dimension is missing, introducing trigonometry as a solution. Using the sine rule, the video demonstrates how to find the area of triangles without a height and extends this method to quadrilaterals by dividing them into triangles. The tutorial concludes with a summary of these techniques.

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3 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the final step after calculating the areas of two triangles to find the total area of a quadrilateral?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

What information is necessary to use the sine rule for calculating the area of a triangle?

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

How do you label the sides and angles of a triangle when using the sine rule?

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