小学试题（Primary examination questions）.doc

小学试题（Primary examination questions） Fill in the blanks (1) the clock minute hand rotates a circle formation (is). (2) the line segment from () to (any) point is called the radius (3) passing (and) and () both in () a line segment called diameter (4) in the same circle, all the radii (), all () are equal, and the diameter is equal to the radius (5) draw a circle with a diameter of 20 cm with compasses, and the distance between two steps is (CM) cm (6) a circle is () a graph, and it has () a symmetrical axis (7) (a) with square symmetry axis, a rectangle (a) axis of symmetry, an isosceles triangle has a symmetry axis (), () is an equilateral triangle symmetric axis. (a) a semi axis of symmetry, an isosceles trapezoid () has a symmetry axis. (8) the perimeter of a circle is the circle diameter (Times). (9) there is a round fish pond with a radius of 10 meters. If you go around it, you have to walk (meters). (10) a clock of the clock is 5 cm long, one day the root tip of the left (clockwise) cm. (11) when drawing a circle, the distance between the legs of a compass is round. (12) the line segment at each end of the circle, the longest. (13) the ratio of the radius to the diameter of the circle is (), and the ratio of the circumference to the diameter of the circle is (). (14) the radius of the small circle is 6 centimeters, and the radius of the big circle is 9 centimeters. The ratio of the diameter of a small circle to the diameter of a great circle is () the ratio of the circumference of the small circle to the circumference of the great circle. (15) the radius of the circle is 7 cm, its circumference is () cm, the diameter of the circle is 13 meters, and its circumference is (()) meters. The perimeter of a circle is 75.36 decimeters, its radius is (). (16) put a wire hoop outside the cylindrical barrel with a radius of 14 cm, and the joint is 6 cm. Use wire () cm. (17) draw a circle with compasses. If the distance between the legs of a compass is 6 centimeters, the c