As shown in the following figure, the radius of a circle is 1 cm, and it circles a round around the right trapezoid. What’s the total distance the centre O goes? (AD=5cm,BC=8cm,AB=6cm,CD=8cm) 相关知识点: 试题来源: 解析 [解析]圆心O走的路程就是梯形的四条边和一个半径是1厘...
There's no way to figure out the area of the shaded region directly, but you can figure out the area of the non-shaped region and subtract. Since the radius of the circle is 5, you know that the area of the circle is 25π. Subtract that from the area of the square, 100, to ge...
You can see that the area of the shaded region is just the difference of the area of the big circle (radius b) and the area of the small circle (radius a). The area of the small circle is just a^2, and the area of the big circle is just b^2. So the difference is:π b^2...
If the radius(半径)of circle IIl in the figure is of the radius of circle ll ,and the radius of cirdle ll is of the radius of circle I then the4***area of the shaded region is what part of the area of circle I ? ( )IⅢAn7 25 9 ...
Figure A is a circle with radius 6. Figure B is a bounded semicircle with radius 6. What is the ratio of the perimeter of A to the perimeter of B?( )A.1:2B.2:1C.2π:π+2D.π+2:2π 答案 C相关推荐 1Figure A is a circle with radius 6. Figure B is a bounded semicircle wi...
'The figure of'是一个固定搭配,其中'figure'一词通常指形状、形象、数字或人物等含义,而'of'则作为介词,用来连接'figure'与其后的名词或名词短语,共同构成一个完整的意义单位。这一短语在英语中广泛应用于描述具体的事物、形象或抽象的概念,如修辞手法、人物形象、数字数据等...
14. In the figure above, the length of minor arc AB is /2 and the area of the shaded region is 1/6 the area of the entire circle. What is the radius of a circle that is ? the area of the above circle?(A) 9(B) 9/8
BIf r is the radius of the circle, then by KEY FACT J 8, its area is mr2. Therefore, the area of the shaded region is 3mr2, and the area of the entire rectangle is πr2+3πr2=4πr2. AB , the width of the rectangle, is equal to the diameter of the circle. So AB =2r...
of the radius of circle Ⅱ,and the radius of circle Ⅱ is \(\dfrac{4}{5}\) of the radius of circleⅠ,then the area of the shaded region is what part of the area of circle Ⅰ ?( ) A: \(\dfrac{7}{25}\) B: \(\dfrac{9}{20}\) C: \(\dfrac{3}{5}\) D: \(\dfra...
ABIn the figure above, the radius of the circle with centerA is twice the radius of the circle with center B and fourtimes the radius of the circle with center C. If the sum ofthe areas of the three circles is 84π, what is the length ofAC?Directions: For Student-Produced Response ...