[DOC] [TLE] What is "pi r squared?" | Reference.com [PAR]  [DOC] [TLE] Area of a Circle - Math Goodies [PAR] The distance across a circle through its center is called its diameter. We use the 
... The area of a circle is the number of square units inside that circle. If each ... 4 
cm. Area equals Pi times r times r. Area = 3.14  (4 cm)  (4 cm). Area = 50.24 cm... [DOC] [TLE] How to Calculate the Area of a Circle (with Examples) - wikiHow [PAR] C = pi * d calculates the circumference (distance around the outside of the circle). D in the formula refers to the diameter which is the width of the circle. The formula for the area of a circle is A = pi * r * r where r is the radius (diameter / 2). [DOC] [TLE] Area of a circle | Area (video) | Khan Academy [PAR] Nov 10, 2011 - 4 minThe area of a circle is pi times the radius squared (A =  r). Learn how to use this  formula to ... [DOC] [TLE] What is "pi r squared?" | Reference.com [PAR] Pi is a mathematical constant representing the ratio of the circumference of a circle to its diameter, and is approximately equal to 3.14. Pi has also been represented by the Greek letter "" since the 18th century. Where A represents the area, r is the radius, and pi equals 3.14. [DOC] [TLE] Area of a Circle - Math is Fun [PAR] Enter the radius, diameter, circumference or area of a Circle to find the other 
three. ... The area of a circle is  (Pi) times the Radius squared: ... Radius = r = 3... [DOC] [TLE] Area of a circle as a function of the diameter? Need help quick ... [PAR] Aug 29, 2008 ... My AP Calc book says the answer it is pi x diameter squared/4 but I don't ... Area 
of a circle: A = r. Diameter: d = 2r r = d/2. Just do a quick .... Write a formula that 
expresses the area A of a circle as a function of its diameter d. [DOC] [TLE] Why is Area of a Circle Equal to Pi * (Radius Squared)? - Math ... [PAR] I know the formula for the area of a circle is A = pi*r^2, but why does that give ... 
Doctor Jerry Subject: Re: why does pi r square give the area Hello Sandra, ... We 
then imagine "unrolling" this pie along its edge, so that the edge... [DOC] [TLE] Area of a Circle [PAR] Jan 29, 2008 ... Why is the area of a circle pi times the square of the radius? ... circle to its 
diameter, so that the circumference of a circle is pi times the diameter ... This give 
a geometric justification that the area of a circle really is "pi r squared". [DOC] [TLE] Circles - Math.com [PAR] Students, teachers, parents, and everyone can find solutions to their math ... pi ( 
pi ): A number, 3.141592..., equal to (the circumference) / (the diameter) of any 
circle. ... Circumference of Circle = PI x diameter = 2 PI x radius ... area = PI r2. [DOC] [TLE] Area of circle, formula and illustrated lesson: how to calculate the ... [PAR] The formula to find a circle's area  (radius)2 usually expressed as   r 2 ... the 
area formula , the radius of a circle and its graph with with our interactive applet... [DOC] [TLE] Radius, Diameter, Circumference, and Area of Circles - dummies [PAR] The d represents the measure of the diameter, and r represents the measure of 
the radius. ... This formula reads, Area equals pi are squared. Find the radius, 
circumference, and area of a circle if its diameter is equal to 10 feet in length. [DOC] [TLE] How to find the radius of a circle if its area is 314 square miles ... [PAR] To figure this out, you just have to go back to the old formula of area = pi*r^2. In 
this equation

Question: Its area equals pi r (squared)
Answer: Circle