when the

**central angle**is pi/2, it means the area which is given is the 1/4 of the total circle(because pi = 180 degrees and the total**angle**of a circle is 360, which is 2 pi). and the arc is given...2 Answers · Education & Reference · 20/04/2013

... by .208333 equals length of the arc which is 5.236 A

**calculator**to check your work is located here: http://www.1728.com/circsect.htm (choose radius and**central angle**)4 Answers · Science & Mathematics · 12/07/2010

...2 arc length and 2 • 13π/18 = 13π/9 arc length Do out on your calculator to get it to 2 decimal places.

2 Answers · Education & Reference · 19/01/2012

arc length is in cm therefore radius is also in cm r = 8/pi cm

3 Answers · Science & Mathematics · 20/04/2013

...we have stacked two right triangles on top of each other, each with a central angle of π/8 radians. The circle is a unit circle, so OQ...

9 Answers · Science & Mathematics · 16/11/2015

(55/360) pi (5.7)^2 = ...

**calculator**1 Answers · Science & Mathematics · 22/12/2011

...3.4 x 114. So you just made a mistake entering it on the

**calculator**. A radian is a measure of**angle**. There are 2pi radians of**angle**in a circle, so this is...2 Answers · Science & Mathematics · 18/01/2011

...let's convert the

**angle**to radians. use the conversion on your**calculator**, or try**angle**/ (360 / 2Pi). in unit analysis, make sure the degrees cancel...2 Answers · Science & Mathematics · 25/03/2007

Central angle θ = π/2 (= 90°). That is 1/4 of the circle, so the arc length is 1/4 of the perimeter. perimeter = 2πr = 20π arc length = (¼)perimeter = 5π cm

2 Answers · Science & Mathematics · 13/05/2009

...sector to the entire circle part : whole = part : whole

**angle**of sector /**angle**of circle = area of sector / area of circle there are 360 ... / (pi * 2.8^2) A = 100pi * 2.8^2 / 360 (punch**calculator**buttons here...)1 Answers · Science & Mathematics · 22/06/2009