Calculating the Length and Width of the TV

Oct 13, 2025 by miodeya.com 91 views

Introduction

When it comes to understanding the dimensions of a TV, most people would think that the diagonal measurement is the only information needed to determine its exact length and width. However, in this article, we will delve into the fascinating world of right triangles and explore how the diagonal of a TV can be used to calculate its exact dimensions using the principles of the 30-60-90 triangle.

The 30-60-90 Triangle: A Brief Overview

The 30-60-90 triangle is a special type of right triangle that has a unique set of ratios between its sides. In this triangle, the side opposite the 30-degree angle is half the length of the hypotenuse, while the side opposite the 60-degree angle is $$\sqrt{3}$$ times the length of the side opposite the 30-degree angle. This triangle is commonly used in geometry and trigonometry to solve problems involving right triangles.

The Diagonal of the TV: A 30-60-90 Triangle

Given that the diagonal of the TV is 28 inches long, we can assume that it forms a pair of 30-60-90 right triangles. This means that the diagonal is the hypotenuse of the triangle, and the other two sides are the base and height of the TV.

Calculating the Length and Width of the TV

To calculate the length and width of the TV, we need to use the ratios of the 30-60-90 triangle. Let's assume that the length of the TV is x inches. Then, the width of the TV would be $$x\sqrt{3}$$ inches.

Using the Pythagorean Theorem

We can use the Pythagorean theorem to solve for the length of the TV. The Pythagorean theorem states that the square of the hypotenuse (c) is equal to the sum of the squares of the other two sides (a and b). In this case, the hypotenuse is the diagonal of the TV (28 inches), and the other two sides are the length and width of the TV (x and $$x\sqrt{3}$$ inches).

Applying the Pythagorean Theorem

Using the Pythagorean theorem, we can set up the following equation:

x^2 + (x\sqrt{3})^2 = 28^2

Simplifying the equation, we get:

x^2 + 3x^2 = 784

Combine like terms:

4x^2 = 784

Divide both sides by 4:

x^2 = 196

Take the square root of both sides:

x = 14

Calculating the Width of the TV

Now that we have found the length of the TV (14 inches), we can calculate the width of the TV using the ratio of the 30-60-90 triangle:

\text{Width} = x\sqrt{3}

Substitute x = 14:

\text{Width} = 14\sqrt{3}

Conclusion

In conclusion, we have used the principles of the 30-60-90 triangle to calculate the exact length and width of a TV given its diagonal measurement. By applying the Pythagorean theorem and using the ratios of the 30-60-90 triangle, we have found that the length of the TV is 14 inches and the width is $$14\sqrt{3}$$ inches.

Frequently Asked Questions

Q: What is the diagonal of the TV? A: The diagonal of the TV is 28 inches long.
Q: What type of triangle is formed by the diagonal of the TV? A: The diagonal of the TV forms a pair of 30-60-90 right triangles.
Q: How can we calculate the length and width of the TV? A: We can use the ratios of the 30-60-90 triangle and the Pythagorean theorem to calculate the length and width of the TV.

Final Answer

The final answer is: $\boxed{14}$

Introduction

The 30-60-90 Triangle: A Brief Overview

The Diagonal of the TV: A 30-60-90 Triangle

Calculating the Length and Width of the TV

Using the Pythagorean Theorem

Applying the Pythagorean Theorem

Using the Pythagorean theorem, we can set up the following equation:

x^2 + (x\sqrt{3})^2 = 28^2

Simplifying the equation, we get:

x^2 + 3x^2 = 784

Combine like terms:

4x^2 = 784

Divide both sides by 4:

x^2 = 196

Take the square root of both sides:

x = 14

Calculating the Width of the TV

Now that we have found the length of the TV (14 inches), we can calculate the width of the TV using the ratio of the 30-60-90 triangle:

\text{Width} = x\sqrt{3}

Substitute x = 14:

\text{Width} = 14\sqrt{3}

Conclusion

Frequently Asked Questions

Q: What is the diagonal of the TV?

A: The diagonal of the TV is 28 inches long.

Q: What type of triangle is formed by the diagonal of the TV?

A: The diagonal of the TV forms a pair of 30-60-90 right triangles.

Q: How can we calculate the length and width of the TV?

A: We can use the ratios of the 30-60-90 triangle and the Pythagorean theorem to calculate the length and width of the TV.

Q: What is the length of the TV?

A: The length of the TV is 14 inches.

Q: What is the width of the TV?

A: The width of the TV is $$14\sqrt{3}$$ inches.

Q: Can we use the diagonal of the TV to calculate its dimensions?

A: Yes, we can use the diagonal of the TV to calculate its dimensions using the principles of the 30-60-90 triangle.

Q: What is the significance of the 30-60-90 triangle in geometry and trigonometry?

A: The 30-60-90 triangle is a special type of right triangle that has a unique set of ratios between its sides, making it a useful tool in geometry and trigonometry.

Q: Can we use the Pythagorean theorem to solve for the length of the TV?

A: Yes, we can use the Pythagorean theorem to solve for the length of the TV.

Q: What is the Pythagorean theorem?

A: The Pythagorean theorem states that the square of the hypotenuse (c) is equal to the sum of the squares of the other two sides (a and b).

Final Answer

The final answer is: $\boxed{14}$