SOLUTION: The sides of and isosceles triangle have lengths 5, 10, and 10. What are the measures of its angles?

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Question 418717: The sides of and isosceles triangle have lengths 5, 10, and 10. What are the measures of its angles?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi

isosceles triangle with sides having lengths 5(the base), 10, and 10

(picture dropping altitude down intersecting the base)

the Base Angles = 75.5°  cos θ= adj/hyp = 2.5/10 = .25  θ = 75.5°

The angle across from the base = 29°  (180°-151°)