Area of a regular polygon equals to the one half of the product of its perimeter with the apothem. So we have:
A = (1/2)(a)(P)
Since our polygon has 10 sides each with length 1.2, the perimeter is 12 910 x 1.2).
Substitute 12 for the perimeter, and 1.85 for the apothem in the area formula:
A = (1/2)(a)(P)
A = (1/2)(1.85)(12)
A = 11.1
Thus, the area of the decagon is 11.1.
378 cm ^2
The apothem and side length are not consistent. That is, a decagon with an apothem of 3.8 cm cannot have a side length of 2.5 cm.If the apothem is 3.8 cm then area = 46.9 cm2 whileif the side length is 2.5 cm then area = 48.1 cm2.The two answers agree at the tens place and so the most accurate answer is 50 cm2 to the nearest 10.
5xy
Perimeter = 2*Area/Apothem.
About 289
It is 665.1 sq inches.
regular pentagon area of 12 000 m2 and an apothem of 40 m regular pentagon area of 12 000 m2 and an apothem of 40 m need to figure it out from area 12000 m2
The apothem is 12.5 metres.
665.1 square units.
Area in square units = 0.5*(apothem)*(perimeter)
No.
Find the apothem of a regular polygon with an area of 625 m2 and a perimeter of 100 m.