posted
Hint: Draw a line from the vertex perpendicular to the baseline. You now have two right triangles to work with and the lengths of the sides of those triangles.

That should be a plenty big enough hint.
Posts: 26071 | Registered: Oct 2003
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Where A, B and C are the lengths of the sides of the triangle, and alpha is the angle oposite side A. Since you want to find the vertex, you would use A=28, B=22 and C=22, then use the inverse cosine function to solve for the angle.

(edit): wow, you guys are fast.
Posts: 43 | Registered: Oct 2001
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posted
Starsnuffer, once you calculate it, please post what you got for whichever trig ratio you used and the final angle. Now I'm curious, but I don't want to do the math.
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