The study aimed to investigate the effectiveness of the Mathigon software in acquiring Geometrical concepts and the attitude towards Geometry among ninth-grade female students. The study used a quasiexperimental approach and had 59 participants from the Governorate of Muscat in the Sultanate of Oman. They were divided into two groups: an experimental group consisting of 30 female students who studied using the Mathigon software, and a control group consisting of 29 female students who studied in the usual teaching method. To achieve the objectives of the study, the researcher prepared a guide for the teacher and student in teaching the unit “Circles, Straight Lines, Angles, and Geometric Shapes” using the Mathigon software and used two reliable tools to gather data: a test for acquiring geometry concepts consisting of 18 items, and a measure of attitude towards geometry, consisting of 26 items. The results of study show that there is a statically significant difference at the level of (α = 0.05) between the mean scores of the ninth graders of the experimental group who studied using Mathigon software and the mean scores of the control group students who studied in the normal way in the test of acquiring the geometry concepts and in the measure of attitude towards geometry in favor of the experimental group. In light of the results, as the study showed a positive impact on the acquisition of geometry concepts in the “Circles, Straight Lines, Angles, and Geometric Shapes” unit for female students, the study recommended the necessity of employing and using Mathigon software in teaching various topics in mathematics in general, and geometry in particular.