This paper presents Tangible Geometry, a learning system designed to support geometry education for students with visual impairments. Traditional geometry instruction relies heavily on visual representations, creating significant barriers for learners with visual impairments. Our system integrates a mobile application with tactile interaction, enabling learners to explore geometric concepts such as shapes, areas, volumes, and equations through hands-on engagement with tangible geometric objects that include foldable inserts. The system features sensor-embedded geometric shapes that enhance interaction, while an interactive voice interface provides real-time guidance in both English and Arabic. We describe the co-design process and preliminary findings from user research.