(a) Draw a circle of radius 3 cm.(b) Draw a chord of length 5 cm, inside the circle.(c) Draw the perpendicular bisector of the chord.(d) What is the length of the new chord that is formed by the perpendicular bisector? 相关知识点: ...
A circle has a radius of 3 cm. What is the circumference of the circle? A. 6π cm B. 9π cm C. 18π cm D. 3π cm 相关知识点: 试题来源: 解析 A。圆的周长 = 2×π×半径,即 2×π×3 = 6π cm 。选项 B、C、D 计算错误。
A到B转了（8.28-1-1）÷（2×3.14）=1（圈），娃娃脸同A；B到C转了（5.14-1-1）÷（2×3.14）=0.5（圈），娃娃与A上下相反；C到D转了（8.28-1-1）÷（2×3.14）=1（圈），娃娃脸同C；D到A转了（5.14-1-1）÷（2×3.14）=0.5（圈），娃娃脸回到A位置；小圆盘共...
To solve the problem of drawing a circle of radius 3 cm and a tangent to the circle making an angle of 30 degrees with a line passing through the center, follow these steps:1. Draw the Circle: - Use a compass to draw a circl
Let theta be required angle thereforetheta=(arc)/("radius")=(1)/(3) radians Now , 1 radian =(180^(@))/(pi) therefore(1)/(3)" radian" =(180^(@))/(pi)xx(1)/(3)=(60^(@))/(pi) Hence , Required angle =theta=(60^(@))/(pi)
The radius of a circle is 3 cm. What is the area of the circle? A. 28.26 cm² B. 18.84 cm² C. 9.42 cm² D. 14.13 cm² 相关知识点: 试题来源: 解析 A。面积 = 3.14×3×3 = 28.26cm²。B 选项 18.84 是圆的周长;C 选项 9.42 计算错误;D 选项 14.13 计算错误。
One central circle, of radius 3 cm and centre O, is completely surrounded by other circles which touch it and touch each other, as shown in the diagram. These outer circles are identical to each other.Extend the result to n small circles and test your result when n=20. 相关知识点: ...
Radius OA, OB, and OE PQ Diameter and chordExample 3: If a circle has a radius of 3 cm, what is the length of its longest chord?Solution:The longest chord is the diameter of the circle.Diameter = 2 × radius = 2 × 3 = 6 cm...
Step by step video & image solution for A circle of radius 5 cm is drawn and another circle of 3 cm radius is cut out of this circle. What is the radius of a circle which has the same area as the area of the bigger circle excluding the cut one? (a) 2 cm (b) 3 cm (c) 4...
Area = πr2= $\frac{22}{7}$ x 7 x 7 = 154 cm2 Now, what is instead of the radius we are given the diameter of a circle, how do we calculate the area? We know that in a circle, the radius is half of the diameter. Mathematically, ...