The purpose of this study was to determine the learning outcomes of junior high school students to Geometry that Flat SideSpaceBuild (BRSD) and the students' response to e-learning based learning. Subjects in this study were students of class VIII-2 SMPN 9 Banda Aceh totaling twenty-two people. Data collected through observation during the implementation of learning and test that consists of an online quiz at each meeting and tests at the end of the implementation of learning to determine the ability of students to understand and master the material BRSD. The result was that 73% of students scored in the top of 60, while a value above 70 was only ten students (45%). Of the whole matter, it turns out there were some students have difficulty in linking formula surface area or volume formula to obtain the value of one unknown. In addition, students still have difficulty in understanding the material prism and pyramid. This was because both of these materials have many kinds. Because of this, e-learning based learning was apt used as one method to improve understanding and learning outcomes of students in mastering the subject matter, especially mathematics. Besides being attractive, e-learning-based learning can help students in mastering the use of computers.