Glencoe Geometry is the leading geometry program on the market. Algebra and applications are embedded throughout the program and an introduction to geometry proofs begins in Chapter 2.
An excellent textbook. Some of the more challenging chapters are reasoning (logic), proof, and transformations. The latter is important as it is used in animation and graphics. The text is solid on standard topics relating to points, lines, planes, angles, triangle and polygonal relationships. Interestingly, I find that some students who excel in Geometry, struggle in Algebra - - or vice versa - - they seem to require different mental processing skills.