The side of a regular pentagon is a. Find the radii of the inscribed and circumscribed circles.
| August 5, 2021 | education
Formulas connecting the side of a regular polygon with the radii of the inscribed and circumscribed circles:
a (n) = 2r * tg 180 ° /).
a (n) = 2R * sin (180 ° / n).
where a (n) is the side of a regular polygon, n is the number of its sides.
r = a (n) / 2 tan * (180 ° / n).
R = a (n) / 2 Sin * (180 ° / n).
n = 5.
r = a / (2tg36 °).
R = a / (2sin36 °).
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
