解説して---**Extraction Content:** **(4)** 右の図のように, 四角形 ABCD と三角形 OCD を作りました。A, B, C, Dは円周上の点で, Oは円の中心です。この図の色のつ けた2つの角の大きさの和は[ア][イ][ウ]度です。 ア, イ, ウにあてはまる数を, 次から1つずつ選びなさい。ただし, 答えが2けたの場合は, 「099」のように百の位に0をつけなさい。 **Chart/Diagram Description:** * **Type:** Geometric figure inside a circle. * **Main Elements:** * A circle with center labeled O. * Four points A, B, C, D are located on the circumference of the circle. * A quadrilateral ABCD is inscribed in the circle, formed by connecting points A to B, B to C, C to D, and D to A with straight lines. * A triangle OCD is formed by connecting O to C, O to D, and C to D with straight lines. * Angle ∠COD at the center O is labeled with a value of 72°. * Two angles of the quadrilateral, ∠BAD at vertex A and ∠BCD at vertex C, are shaded with gray arcs. * The figure shows the relative positions of A, B, C, D on the circle in a counter-clockwise order. **Options Grid:** * **For ア:** Circles labeled ① to ⑩ corresponding to numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 0. * **For イ:** Circles labeled ① to ⑩ corresponding to numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 0. * **For ウ:** Circles labeled ① to ⑩ corresponding to numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 0.