2016年8月31日 · See explanation... The circumference of a circle is pi times its diameter. In fact that's the original definition of pi. SInce the diameter is twice the radius, that means that the …

2015年12月1日 · Area = piR 2 If your area in the intensity formula is 2piR 2 , then the radio tower must have 2 cross-sections that have circular shapes. Upvote • 0 Downvote

2017年2月12日 · Please see below. pi is defined as the ratio of circumference C of a circle to its diameter, which is double the radius r, hence by definition pi=C/(2r and C=2pir There are …

2016年1月1日 · See explanation... The circumference of a circle of radius r is of length 2pi r, by the definition of pi. If you dissect a circular disc into segments of equal size, you can …

The area of a circle is given by the formula A=piR^2 where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100 times pi square inches, what is the …

2015年12月25日 · The typical area for a circle is: #color(white)(sss)A=pir^2# Divide both sides by #2#, or multiply both by #1/2#, to find the formula for half the area:

2018年3月8日 · A = pir^2 or pi(d/2)^2 "Area of a circle" = pir^2 or "Area of a circle" = pi(d/2)^2 Where; A = "Area of a circle" pi = 22/7 or 3.142 r = "radius of a circle" d = "diameter of a circle" …

2015年12月30日 · If given the area: The normal area of a circle is A=pir^2. Since a semicircle is just half of a circle, the area of a semicircle is shown through the formula A=(pir^2)/2. We can …

2018年5月7日 · h=V/(pir^2) >"given "V=pir^2h "then to find h in terms of the other values divide both" "sides by the multiplier of h" "h is multiplied by "pir^2 "divide both sides by "pir^2 …

2017年10月18日 · #color(white)("XXX")(d pir^2)/(dr)=color(red)(2pir)# Explanation: In general the power rule for differentiating a function of the general form #f(x)=c * x^a# where #c# is a constant