Friday

December 19, 2014

December 19, 2014

Posted by **Anne** on Monday, December 5, 2011 at 11:54am.

- math **urgent** -
**Reiny**, Monday, December 5, 2011 at 12:34pm8 sides, so each side = 12.5 ft

split the octogon into 8 isosceles triangles.

Consider one triangle, the central angle is 360/8 = 45°, so each base angle = 67.5°

tan 67.5 = height/6.25

height = 6.25(tan67.5) = 15.0888...

area of one triangle = (1/2)(12.5)(15.0888..)

= 94.3052..

area of whole thing =8(94.3052..) = 754.4417

check my arithmetic, I had my calculator keep all the digits as I went along

**Answer this Question**

**Related Questions**

math - using 100 ft of fence material an dbuilding a regular gexagon garden, ...

5th grade math - suppose you are building a fence for a garden in your yard. ...

Math - The dimensions of Mrs. Singleton's square garden are dilated using a ...

algebra - A farmer decides to enclose a rectangular garden, using the side of a ...

arithematic - A horticulturalist is building a fence around a rectangular garden...

Algebra - A farmer decides to enclose a rectangular garden, using the side of a ...

Math - Amandeep decides to grow a vegetable garden. She wants to make it 10.1m ...

Geometry - Harris is planting a rectangular garden with an area of 48 square ...

Pre-Calculus - A rectangular garden with an area of 250 square meters is to be ...

word problems - harris is planting a rectangular garden with an area of 24 ...