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What equation do you use to find a triangles angle with 3 side lengths?
Wiki User
∙ 12y ago
First use the cosine rule:
If the three sides are of lengths a, b and c and C is the angle opposite side c, then
CosC = (a2 + b2 - c2)/2ab
So angle C = Cos-1[ (a2 + b2 - c2)/2ab ]
Angles A and B can be found similarly, or more simply, using the Sine rule:
SinA/a = SinB/b = SinC/c
Wiki User
∙ 12y ago
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How do you find an angle of a right triangle?
you need to have at least 2 values of the lengths of the triangle and then you can find the angle by sine, cosine or tangent formulas you may try this online calculator for right triangles. http://www.rillocenter.com/calculate/trigonometry.html
How calculate angle in isosceles triangle?
use protractor, or divide isosceles triangle into two right triangles, and use trigonometric functions to find the angles individually (ONLY IF YOU HAVE ALL SIDE LENGTHS CAN YOU DO THIS)
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find out your self
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The lengths of all three sides of the triangle APEX:)
How do you find an angle of a right triangle?
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What is trigonometry used to find?
It is used to find measures of angles and lengths of sides in triangles.
How calculate angle in isosceles triangle?
use protractor, or divide isosceles triangle into two right triangles, and use trigonometric functions to find the angles individually (ONLY IF YOU HAVE ALL SIDE LENGTHS CAN YOU DO THIS)
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You cannot. The arms of an angle are of unspecified lengths and the shape is not closed so there is no finite area to find.
Do all hyperbolic triangles have the same angle sum?
find out your self
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The law of sines is used to find missing values in triangles. The formula is a/sinA=b/sinB=c/sinC. The idea behind the equation is that the larger an angle is the larger the side across from it will be and the smaller the angle the smaller the side across from it will be. Once you have set up your equation you can easily solve your equation with some simple algebra and a calculator.
What are the five ways to prove a triangles congruent?
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Hypotenus is found in Right Angle triangles 90 Degrees
