Posted by Mike on .
Yesterday I learned to solve a right triangle assuming I know the 3 angles and 1 side. I can now establish the lengths of the 2 other sides using a sine table I printed off the net.
Today I hope I will learn to solve a right triangle but now I only know 1 angle (the right angle) and 2 sides (not the hypotenuse). How do I establish the other 2 angles?
You know two sides, a and b. Compute the third side length with c^2 = a^2 + b^2. Then use
a/c = sin A
b/c = sin B = cos A
to solve for the two angles. You can use either a sine table or an arcsine table.