Match each circumference to the corresponding radius or diameter of the circle. (All circumferences are approximate.) Tiles circ
umference: 34.54 units circumference: 59.66 units circumference: 23.236 units circumference: 26.376 units circumference: 13.188 units circumference: 29.83 units Pairs radius: 4.2 units diameter: 7.4 units diameter: 11 units radius: 9.5 units
We solve for the diameters of radius of the given circles by using the equation, C = πD or C = 2πr where D and r are diameter and radius, respectively.
Solving, C = 34.54 units D = C/π = 34.54 units / 3.14 = 11 units r = C / 2π = 34.54 units/2(3.14) = 5.5 units
C = 59.66 units D = C/π = 59.66 units/3.14 = 19 units r = D2 = 9.5 units C = 23.236 units D = 23.236 units/3.14 = 7.4 units r = D/2 = 3.7 units C = 23.376 units D = 23.376 units / 3.14 = 7.4 units r = D/2 = 3.7 units C = 13.188 units D = 13.188 units/3.14 = 4.2 units r = D/2 = 2.1 units
Explaination: in order to find how many words he can read in 25 minutes we need to find how many words he can read in one minute then multiply that by the number of minutes he read. Like this
