SOLUTION: Please help me solve this equation: One of the equal sides of an isosceles triangles is 2cm and one of the base angle is 30 degrees. Find the base, altitude and vertical angle.

Algebra ->  Trigonometry-basics -> SOLUTION: Please help me solve this equation: One of the equal sides of an isosceles triangles is 2cm and one of the base angle is 30 degrees. Find the base, altitude and vertical angle.       Log On


   

Question 835321: Please help me solve this equation: One of the equal sides of an isosceles triangles is 2cm and one of the base angle is 30 degrees. Find the base, altitude and vertical angle.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Please help me solve this equation: One of the equal sides of an isosceles triangles is 2cm and one of the base angle is 30 degrees. Find the base, altitude and vertical angle.
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Draw the figure:
You have an isosceles triangle with each base angle = 30 degrees.
The vertical angle is 180-2*30 = 120 degrees
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Draw an altitude from the vertex to the base
That altitude is opposite a 30 degree angle.
sin(30) = altitude/hypotenuse
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1/2 = altitude/2
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altitude = 1 cm
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Cheers,
Stan H.
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