how to find the degree of an unknown angle ?

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how to find the degree of an unknown angle ?

Here are some links that might be useful to you:

https://www.radfordmathematics.com/geometry-trigonometry/right-angle-trigonometry/soh-cah-toa-how-find-unknown-angles.html

https://www.radfordmathematics.com/geometry-trigonometry/right-angle-trigonometry/soh-cah-toa-how-find-unknown-angles.html
SOH CAH TOA – How to Find Unknown Angles
To find unknown angles in right angle triangles we use the trigonometric rations. In particular we use SOH CAH TOA. The method is shown with tutorials and worked examples as well as exercises.

https://www.mathsisfun.com/algebra/trig-finding-angle-right-triangle.html

https://www.mathsisfun.com/algebra/trig-finding-angle-right-triangle.html
Finding an Angle in a Right Angled Triangle – Math is Fun
We can find an unknown angle in a right-angled triangle, as long as we know the lengths of two of its sides. Example The ladder leans against a wall as shown. What is the angle between the ladder and the wall? The answer is to use Sine, Cosine or Tangent! But which one to use?

https://www.effortlessmath.com / math-topics / solving-unknown-angles

https://www.effortlessmath.com / math-topics / solving-unknown-angles
How to Solve Unknown Angles? (+FREE Worksheet!) – Effortless Math
To determine the measurement of an unknown angle, we must identify the angle relationship (s), and then model the relationship with an equation that will yield the unknown value. If the sum of the measurements of two angles is (90^ {circ}), angles are complementary angles and one is the complement of the other.

https://www.omnicalculator.com/math/right-triangle-side-angle

https://www.omnicalculator.com/math/right-triangle-side-angle
Right Triangle Calculator | Find a, b, c, and Angle
18 janv. 2024a = √ (c² – b²) If leg b is unknown, then: b = √ (c² – a²) For hypotenuse c missing, the formula is: c = √ (a² + b²) 🙋 Our Pythagorean theorem calculator will help you if you have any doubts at this point. 2. Given an angle and the hypotenuse Apply the law of sines or trigonometry to find the right triangle side lengths:

https://www.omnicalculator.com/math/triangle-angle

https://www.omnicalculator.com/math/triangle-angle
Triangle Angle. Calculator | Formula
18 janv. 2024If the angle is between the given sides, you can directly use the law of cosines to find the unknown third side, and then use the formulas above to find the missing angles, e.g. given a,b,γ: calculate c = sqrt {a^2 + b^2 – 2ab times cos (gamma)} c = a2 + b2 −2ab×cos(γ)

https://www.youtube.com/watch?v=4Dv5IFqATrc

https://www.youtube.com/watch?v=4Dv5IFqATrc
How To Calculate The Missing Angle In a Triangle – YouTube
This trigonometry video tutorial explains how to calculate the missing angle in a triangle. Examples include the use of trigonometric ratios such as sine, c…

https://math.libretexts.org/Bookshelves/PreAlgebra/Pre-Algebra_I_(Illustrative_Mathematics_-_Grade_7)/07:_Untitled_Chapter_7/7.01:_New_Page/7.1.5:_Using_Equations_to_Solve_for_Unknown_Angles

https://math.libretexts.org/Bookshelves/PreAlgebra/Pre-Algebra_I_(Illustrative_Mathematics_-_Grade_7)/07:_Untitled_Chapter_7/7.01:_New_Page/7.1.5:_Using_Equations_to_Solve_for_Unknown_Angles
7.1.5: Using Equations to Solve for Unknown Angles
To find an unknown angle measure, sometimes it is helpful to write and solve an equation that represents the situation. For example, suppose we want to know the value of (x) in this diagram. Figure (PageIndex{12}) Using what we know about vertical angles, we can write the equation (3x+90=144) to represent this situation.

https://www.youtube.com/watch?v=5v44XaewsP8

https://www.youtube.com/watch?v=5v44XaewsP8
Trigonometry : Finding Unknown Angles – YouTube
Learn how to find unknown angles, using sine, cosine, and tangent. Detailed examples, in which we make use of son-cah-toa.www.RadfordMathematics.com

https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-solve-for-a-side/a/unknown-side-in-right-triangle-w-trig

https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-solve-for-a-side/a/unknown-side-in-right-triangle-w-trig
Solving for a side in right triangles with trigonometry – Khan Academy
The trigonometric ratio that contains both of those sides is the sine. [I’d like to review the trig ratios.] Step 2: Create an equation using the trig ratio sine and solve for the unknown side. sin ( B) = opposite hypotenuse Define sine. sin ( 50 ∘) = A C 6 Substitute. 6 sin ( 50 ∘) = A C Multiply both sides by 6. 4.60 ≈ A C Evaluate with …

https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-triangle-angles/v/triangle-angle-example-2

https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-triangle-angles/v/triangle-angle-example-2
Worked example: Triangle angles (intersecting lines)
So, you know that all the angles in any triangle add up to 180 degrees (I assume). To find the missing angle, you need to subtract the given angles from 180, and you will find the missing angle. The reason that Sal chose to subtract from 121 is because instead of subtracting 121 from 180 to find the inner angle (because they are supplementary …
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