Thursday

December 18, 2014

December 18, 2014

Posted by **Tony** on Monday, March 11, 2013 at 1:59pm.

- Geometry -
**Steve**, Monday, March 11, 2013 at 2:44pmperimeter = 2r+rθ = 40

r = 40/(θ+2)

a = 1/2 r^2 θ = 800θ/(θ+2)^2

da/dθ = 800(θ-2)/(θ+2)^3

da/dθ = 0 when θ=2 for maximum area

Note that it doesn't really matter what p is; max area for a constant perimeter is when θ=2

**Answer this Question**

**Related Questions**

geometry! - Γ is a circle with center O. A and B are points on Γ such ...

geometry - Γ is a circle with radius 10 and center O. A and B are points on...

trigonometry - A sector AOB of a circle, centre O, radius r cm, where the acute ...

geometry - in a regular polygon, with center O, and a side AB, measure of angle ...

math - 8th grade - I have a table to complete.Given that points A and B belong ...

geometry - In circle O, ∠AOB intercepts an arc whose measure is 50. What ...

Geometry - The measure of the central angle of a sector of a circle is ...

can xome1 help me plzz im stuck - HELP PLZZ...A circle has radius 2 cm,(in that ...

maths - please can some one help me..? Part a - O is the centre of the circle, ...

Math - Hello, I have this question to which it's solution I'm not quite sure of...