Understanding Triangle Area Calculation

The video tutorial explains how to find the area of a triangle when only the side lengths are known. It introduces Heron's formula and aims to prove it using geometry. The tutorial uses the Pythagorean theorem to find the height of the triangle and solve for unknowns. It then calculates the area using derived formulas and compares the results with Heron's formula, verifying the accuracy of both methods.

What is the basic formula for the area of a triangle?

• base plus height

• base times height

• 1/2 times base times height

• 1/3 times base times height

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CCSS.HSG.SRT.D.9

What is the purpose of introducing Heron's formula in the context of this problem?

• To find the perimeter of a triangle

• To calculate the area without knowing the height

• To determine the angles of a triangle

• To find the length of the sides

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In the process of deriving the height, what is the significance of defining the variable x?

• It is used to calculate the perimeter

• It is the height of the triangle

• It represents the base of the triangle

• It helps in setting up Pythagorean equations

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How is the height of the triangle expressed in terms of a, b, and c?

• As a difference between a and b

• As a product of a, b, and c

• As a square root expression involving a, b, and c

• As a simple sum of a, b, and c

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CCSS.HSG.SRT.D.9

What is the final expression for the area of the triangle derived in the video?

• 1/2 times base times height

• Heron's formula directly

• A complex expression involving a, b, and c

• Base times height

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CCSS.HSG.SRT.D.9

Why is it important to verify the derived formula with an example?

• To determine the type of triangle

• To ensure it matches Heron's formula

• To find the perimeter of the triangle

• To calculate the angles of the triangle

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What was the area of the triangle with sides 9, 11, and 16 using Heron's formula?

• 15 times the square root of 6

• 25 times the square root of 8

• 18 times the square root of 7

• 20 times the square root of 5

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CCSS.HSG.SRT.D.9

What is the result of applying the derived formula to the triangle with sides 9, 11, and 16?

• 48.50

• 45.00

• 50.00

• 47.62

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CCSS.HSG.SRT.D.9

What is the main challenge in using the derived formula compared to Heron's formula?

• It is more complex and harder to remember

• It requires additional measurements

• It only works for right triangles

• It is less accurate

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CCSS.HSG.SRT.D.9

What is the next step mentioned in the video after deriving the formula?

• Proving it can be reduced to Heron's formula

• Calculating the perimeter

• Finding the angles

• Determining the type of triangle

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CCSS.HSG.SRT.D.9