Question

ABCDEFGHIJ is a regular decagon. Find the length of the apothem. Round the answer to the nearest tenth.

A.

8.0


B.
20.5

C.

24.7


D.

26.0

Answer 1

Solution:(α=∫nₓS)Use this formula to find apothem

∫n is the fixed number (1,539) and S the side of the polygon.

a = 16 × 1,539 = 24,624 = 247

Answer: C 24.7

Answer 2

you find apothem with the formula
`\left[a = fn*S]`

fn is the fixed number (1,539) and S the side of the polygon.

a = 16*1,539 = 24,624 = 24,7

Answer C