posted by Blake on .
I am in the 10th Grade and my question is: The base of an isosceles triangle is 21cm. long. The altitude to the base is 9cm. long. What is the approx. measure of a base angle of the triangle?
The tangent of that angle is 9/10.5 = 0.8571
Trigonometric tables will tell you that the angle is 40.6 degrees.
How did you get 9/10.5 from the problem?
Never mind I got it now. Thanks for the help!!!