Abstract: A bow including: a frame having a predetermined length; a first pulley and a second pulley arranged on a first position and second position of the frame respectively; a first small diameter cam and a first large diameter cam rotated interlocked with the first pulley; a second small diameter cam and a second large diameter cam rotated interlocked with the second pulley; a string fixed to the first pulley and the second pulley, the first pulley and the second pulley being rotated when the string is pulled; a first cable and a second cable arranged in a linear shape between the first (second) small diameter cam and the second (first) large diameter cam, the first cable and the second cable being elastically deformed by being wound around the second large diameter cam or the first large diameter cam when the string is pulled.

Abstract: A bow including: a frame having a predetermined length; a first pulley and a second pulley arranged on a first position and second position of the frame respectively; a first small diameter cam and a first large diameter cam rotated interlocked with the first pulley; a second small diameter cam and a second large diameter cam rotated interlocked with the second pulley; a string fixed to the first pulley and the second pulley, the first pulley and the second pulley being rotated when the string is pulled; a first cable and a second cable arranged in a linear shape between the first (second) small diameter cam and the second (first) large diameter cam, the first cable and the second cable being elastically deformed by being wound around the second large diameter cam or the first large diameter cam when the string is pulled.

Abstract: The present invention provides a figure plate set (10) for learning that comprises a plate member (4) having a concave portion (5); and groups of figure plates (1, 2, 3) that can form a regular polygon by being combined together, wherein the group of figure plates (1, 2, 3) can be stored on concave portion (5) in a state that the regular polygon is formed and the regular polygon is inscribed in an inner peripheral wall (6) of the concave portion (5). From the above, the user can experientially understand the regular polygon through the work of combining the figure plates. Thus, ability of geometric thinking about regular polygon is increased. In addition, since the plate member (4) has the concave portion (5), the group of figure plates (1, 2, 3) can be positioned. Thus, the figure plates (1, 2, 3) can be combined easily.

Abstract: The present invention provides a figure plate set (10) for learning that comprises a first triangular plate (1) that has an isosceles triangular shape having an apex angle of 108° and base angles of 36°; and a second triangular plate (2) that has an isosceles triangular shape having an apex angle of 36° and base angles of 72°, wherein a length of isosceles sides (7, 8) of the first triangular plate (1) is same as a length of isosceles sides (14, 15) or a bottom side (16) of the second triangular plate (2), and a new triangular shape can be formed by combining the first triangular plate (1) and the second triangular plate (2).

Abstract: 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).

Abstract: The present invention provides a figure plate set (10) for learning that comprises a plate member (4) having a concave portion (5); and groups of figure plates (1, 2, 3) that can form a regular polygon by being combined together, wherein the group of figure plates (1, 2, 3) can be stored on concave portion (5) in a state that the regular polygon is formed and the regular polygon is inscribed in an inner peripheral wall (6) of the concave portion (5). From the above, the user can experientially understand the regular polygon through the work of combining the figure plates. Thus, ability of geometric thinking about regular polygon is increased. In addition, since the plate member (4) has the concave portion (5), the group of figure plates (1, 2, 3) can be positioned. Thus, the figure plates (1, 2, 3) can be combined easily.

Abstract: The present invention provides a figure plate set (10) for learning that comprises a first triangular plate (1) that has an isosceles triangular shape having an apex angle of 108° and base angles of 36°; and a second triangular plate (2) that has an isosceles triangular shape having an apex angle of 36° and base angles of 72°, wherein a length of isosceles sides (7, 8) of the first triangular plate (1) is same as a length of isosceles sides (14, 15) or a bottom side (16) of the second triangular plate (2), and a new triangular shape can be formed by combining the first triangular plate (1) and the second triangular plate (2).

Abstract: 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).