SOLUTION: An isosceles triangle has its two equal sides of length 3 and an angle of 125o.
Find the length of its other side.
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Question 761653: An isosceles triangle has its two equal sides of length 3 and an angle of 125o.
Find the length of its other side.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
An isosceles triangle has its two equal sides of length 3 and an angle of 125o.
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Note: The 125 degree angle must be the vertex angle.
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Draw the triangle.
Use the Law of Cosines to find the 3rd side which is the base of the triangle.
b^2 = a^2 + a^2 -2a*a*cos(125)
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b^2 = 9 + 9 - 2*3*3-0.5736) = 18+10.3244 = 28.3244
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Ans: base = b = sqrt[28.3244] = 5.3221
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Cheers,
Stan H.
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