Hello friends, I need help with a geometry question...
http://s8.postimage.org/z1zbxoe39/Semicircle_Triangle.jpg this is the triangle.
Here is what we know:
1) PQ is the diameter of the semicircle.
2) OE equals Radius
3) PQ is parallel to BC
4) AD is the altitude to BC
5) BC = 20, AD = 15
Now, the first part of the question asks us to prove that ABC and APQ have similarity. This I managed to do, so treat it as data.
The second part is to find the radius, and this is where I'm stuck...
Plz help me!