SOLUTION: The base of an isosceles triangle is 25 centimeters long. The altitude to the base is 40 centimeters long. What is the approximate measure of the base angle of the triangle Round y

Algebra ->  Triangles -> SOLUTION: The base of an isosceles triangle is 25 centimeters long. The altitude to the base is 40 centimeters long. What is the approximate measure of the base angle of the triangle Round y      Log On


   

Question 1176588: The base of an isosceles triangle is 25 centimeters long. The altitude to the base is 40 centimeters long. What is the approximate measure of the base angle of the triangle Round your answer to the nearest one decimal (tenth).
Answer by ikleyn(52790) About Me  (Show Source):
You can put this solution on YOUR website!
.

    tan%28alpha%29 = 40%2F%28%2825%2F2%29%29 = 80%2F25 = 3.2.


    alpha = arctan(3.2).


Use your calculator.