SubArea: CirclesLevel: AProject ID: 2010012810Source Problem: 1103021512Accepted: 0Clonable: 1Easy: 1In the triangle KLM, k=10cm, l=8cm, m=12cm. Point N is the foot of the altitude from the vertex K (See the picture.) What is the radius of the circumcircle of the triangle KLN?6cm5cm7cm8cm