nn is the regular polygon's number of sides; aa is the length of the regular polygon's side; rr is the incircle radius or apothem of the regular polygon Since we want to find the area of a decagon, we can replace nn with 1010. Consequently, we can find the value of rr using aa...
Incircle radius or apothem (r) (equal to a2×tan(180°7)2×tan(7180°)a). Craving for more polygon-related knowledge? Here are some of our related tools you can check out: Polygon calculator Dodecagon area calculator Dodecagon calculator Heptagon calculator Decagon area calculator Decagon ...
查看答案 Martha invited 4 friends to go with her to the movies. There are 120 different ways in which they can sit together in a row of 5 seats, one person per seat. In how many of those ways is Martha sitting in the middle seat?查看答案...
In Figure 2c, the decagon is replaced by a pentagon with two diagonals that intersect each other (highlighted in red). One side of the rhombus in this figure coincides with the axis of the smaller lens. Thus, the ratio of the sizes of the two lenses equals the golden ratio. The constr...