The formula for finding an apothem is s = 1/2 aP. S is the area, a is the apothem, and P is the perimeter.
An apothem is a line segment from the center of a regular polygon to the midpoint of a side.
The apothem is 12.5 metres.
Split it into 2 30- 60- 90 triangles (split it in half) then times the short leg ( the side of the hexagon) by the square root of 3 for the apothem (4 x \/3 = apothem)
By joining all the vertices to the centre of the octagon, the apothem forms the height of the triangles with the side of the regular octagon as the base. This the area is 8 × area_triangles = 8 × ½ × side × apothem = 4 × side × apothem: Area_regular_octagon = 4 × side_length × apothem ≈ 4 × 4 in × 4.8 in = 76.8 in²
The apothem, for a circle, is the perpendicular distance from a chord to the centre of the circle.
An apothem is a line drawn perpendicular to a side of a regular polygon from the center of the polygon. A polygon is not a circle so it cannot have a radius. The radius of a circle is drawn from the center to any point in the circumference of the circle. You can draw a circle which encloses the regular polygon touching all vertices. The polygon is said to be inscribed in the circle. The apothem will be less than the radius because the radius is not perpendicular to any side, it can be drawn to a vertex but the apothem is perpendicular to a side, so it is shorter. Ex: draw a square with a circle which inscribes it. You can see that the apothem will be less than the radius.
Area of circle = 225 cm2 implies radius = 8.46 cm (approx) Therefore, apothem of hexagon = 8.46 cm then side of hexagon = apothem*2/sqrt(3) = 9.77 cm (approx) and so perimeter = 6*side = 58.63 cm
The formula for finding an apothem is s = 1/2 aP. S is the area, a is the apothem, and P is the perimeter.
The line joining the centre of the pentagon to any vertex is a radius of the circumscribed circle. The angle between such a line and the adjacent apothem is 360/10 = 36 degrees. If the radius is r, then we can now write: cos36 = 10.8/r So r = 10.8/cos36 = 13.350cm. to 3 decimal places.
The perimeter of a hexagon with an apothem of 12 is 83.14
You can only do this for a regular octagon. It is much easier to understand the method if you do a rough sketch and follow the explanation using that. Unfortunately, this browser does not support any kind of drawing! Suppose the diameter of the octagon is D. Therefore the diameter of the circumscribing circle is also D. Form the centre of this circle, draw lines to two adjacent vertices of the octagon. The lengths of these lines is D/2 because these are radii of the circle. These lines and the side of the octagon form an isosceles triangle, and the apothem is the height of this triangle. Now consider half this triangle: the right angled triangle formed by the apothem, half the side of the octagon and the radius. The angles at the apex of the octagon is 360/8 = 45 degrees. So the angle at the apex of the right angled triangle is half that = 22.5 degrees. Then cos(22.5 deg) = Apothem/Radius So that Apothem = Radius*cos(22.5 deg) = D/2*0.9239 (approx).
Perimeter = 2*Area/Apothem.
The apothem is the perpendicular from the cent of a regular polygon to one of it's sides. When drawn it looks like the line drawn for the radius or circumference of a circle.
An apothem is a line segment from the center of a regular polygon to the midpoint of a side.
If the hexagon has side length s, then the apothem is sqrt(3) * s / 2.
The apothem is 12.5 metres.