Geometry

how do you find the area of an octagon with the radius of four?

  1. 👍 0
  2. 👎 0
  3. 👁 153
  1. I didn't.

    Is the radius measured to the middle of the sides or to the corners?
    (circumscribed or inscribed circle?)

    In suggest you break the octagon up into eight isosceles triangles, and add up the areas. Your "radius" will be the two equal sides, and the apex angle will be 45 degrees for each triangle

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. calculus

    1. The radius of a sphere is r inches at time t seconds. Find the radius when the rates of increase of the surface area and the radius are numerically equal. A 1/4π in B 1/5π in C 1/3π in D 1/8π in E 1/2π in

    asked by Anonymous on March 20, 2013
  2. Math(Please help)

    Related Rates: Gas is escaping from a spherical balloon at the rate of 2ft^3/min. How fast is the surface area shrinking (ds/dt) when the radius is 12ft? (A sphere of radius r has volume v=4/3 pi r^3 and surface area S=4pi r^2.)

    asked by Hannah on March 4, 2011
  3. Caclulus

    Let x and y be to positive numbers whose product is 500: (a) Find the maximum sum of x and y (b) Find the minimum sum of x and y: 2. A cylindrical container can hold a volume of 1 liter. Find the dimensions of the container that

    asked by cool on March 15, 2017
  4. Some algebra please help me!

    1) Find the surface area of a sphere with a radius of 8 cm. A 267.9 cm B 803.8 cm *** C 2143.6 cm D 2010. cm 2) Find the surface area of a sphere with a radius of 4 ft. A 452.2 m B 150.7 m C 113.0 m D 904.3 m *** 3) Find the

    asked by Edward Elric on March 5, 2018
  1. maths-urgently needed

    ABCD is a square with length of each side 1cm. An octagon is formed by lines joining the vertices of the square to the mid points of opposite sides. Find the area of the octagon?

    asked by Anonymous on February 5, 2013
  2. Math--Area

    Find the area of each regular polygon to the nearest tenth. Octagon with side length of 10 kilometers. Heres what I tried; but I don't know if im on the right track. Area=1/2 * Perimeter* Apothem Perimeter=base of octagon* number

    asked by natalie on April 4, 2007
  3. geometry

    The area of a regular octagon is 35 cm2. What is the area of a regular octagon with sides six times as long? so do you times this by 6?

    asked by cindy on January 12, 2012
  4. Geometry

    #19. Given a regular octagon, find the measures of the angles formed by (a) two consecutive radii and (b) a radius and a side of the polygon.

    asked by Heather on April 8, 2014
  1. Trig-Algebra help asap

    A regular octagon is inscribed in a circle with a radius of 5 cm. Find the area of the octagon.

    asked by Missy on March 12, 2012
  2. math

    Octagon PQRSTVWZ is a regular octagon with the center at point C. Which transformation will map octagon PQRSTVWZ onto itself?

    asked by kudu on November 27, 2015
  3. math

    A square whose side is 2m has it's corner cut away so as to form a octagon with all sides equal find the length of each side of octagon and also find the area of the octagon?

    asked by TUHITUHI on September 10, 2012
  4. Area Geometry

    Find the area of a decagon with a radius of 4mm. Find the area of an octagon with a radius of 10 cm.

    asked by hope on April 10, 2012

You can view more similar questions or ask a new question.