Homework Help: math

Posted by ben on Sunday, September 5, 2010 at 3:20pm.

One of the angles of a right triangle measures 30°, and the hypotenuse is 10 inches long. How long is the side opposite the 30° angle?

math - Reiny, Sunday, September 5, 2010 at 4:57pm
sin 30° = x/10
x = 10sin30° = 5

or

using the ratio of sides of the 30-60-90 triangle
x/1 = 2/10
x = 5

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