The present invention provides a figure plate set for learning that comprises a first triangular plate (1) having an angle of 45°, an angle of 45°, and an angle of 90° and a second triangular plate (2) having an angle of 30°, an angle of 60°, and an angle of 90°. A length of one of two orthogonal sides (7, 8) of the first triangular plate (1) is same as a length of one of two orthogonal sides (14, 16) of the second triangular plate. A new triangular shape can be formed by combining the first triangular plate (1) and the second triangular plate (2).