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初中数学升学复习测试题精编──圆与正多边形（一）－、填空题１．若圆内接梯形的一个底角为６０°，则与此角同底的另一个底角的度数等于。２．半径为５ｃｍ的圆中，若一条弦长为８ｃｍ，则此弦的弦心距等于ｃｍ。３．若圆的半径为６，则１２０°的圆心角所对的弧长等于...
Junior high school mathematics review review questions ─ ─ circular and regular polygons (a) - fill in the blank questions 1. If the base angle of a circle inscribed in a trapezoid is 60°, then the degree of the other base angle at the same angle as this corner is equal to. 2. In a circle with a radius of 5 cm, if one string is 8 cm long, the chord center distance of this string is equal to cm. 3. If the radius of the circle is 6, then the arc angle of 120° is equal to...