How Can the Sine Rule Help Determine Lengths in Irregular Shapes?

MHB
Thread starter ketanco
Start date Nov 17, 2018
Tags

Angles Length

In summary, the length of a side in a triangle can be found using various methods such as the Law of Sines, Law of Cosines, and trigonometric functions like sine, cosine, and tangent. These methods involve using the known angles and either the length of another side or the opposite side to the angle in question. Additionally, the Pythagorean Theorem can be used for right triangles, but there are specific formulas like the Law of Sines and Law of Cosines that can be used for finding the length of a side in any triangle if the angles are known.

Nov 17, 2018

ketanco

Hello,
What is the value of x in the attached?
obviously angle EAD = EDA but then what?
the shape is irregular. View attachment 8599

Mathematics news on Phys.org

Nov 17, 2018

I like Serena

Homework Helper

MHB

ketanco said:

Hello,
What is the value of x in the attached?
obviously angle EAD = EDA but then what?
the shape is irregular.

How about using the sine rule, also known as the law of sines?

Related to How Can the Sine Rule Help Determine Lengths in Irregular Shapes?

1. How can I find the length of a side in a triangle if I know the angles?

The length of a side in a triangle can be found using the Law of Sines or the Law of Cosines. These formulas involve using the known angles and either the length of another side or the length of the opposite side to the angle you are trying to find.

2. Can I use trigonometric functions to find the length of a side based on angles?

Yes, trigonometric functions such as sine, cosine, and tangent can be used to find the length of a side in a triangle if you know the angles. These functions can be used in conjunction with the Law of Sines or the Law of Cosines to calculate the length of the side.

3. Is it possible to find the length of a side if I only know one angle and the hypotenuse in a right triangle?

Yes, in a right triangle, you can use the trigonometric function sine to find the length of a side if you know one angle and the length of the hypotenuse. The formula is sin(angle) = opposite/hypotenuse.

4. Can I use the Pythagorean Theorem to find the length of a side based on angles?

Yes, the Pythagorean Theorem can be used to find the length of a side in a right triangle if you know the measures of the other two sides. However, this method only works for right triangles and not all triangles.

5. Is there a specific formula for finding the length of a side if I know the angles in a triangle?

Yes, there are specific formulas such as the Law of Sines and the Law of Cosines that can be used to find the length of a side in a triangle if you know the angles. These formulas involve using the sine, cosine, and tangent functions and the known angles to calculate the length of the side.