We propose two methods for determining the energy and incident angle of registered alpha particles in LR-115 detectors. One of them is based on geometric parameters of track openings at detector surface and the other on geometric parameters of projected tracks on detector surface. Track parameters were extracted from tracks simulated with the TRACK-TEST program. The incident energy and angle was estimated by interpolation and successive approximations in the databases of track parameters. The uncertainties in the calculated values were lower than 3% for both approaches.