The sum of the angle measures in a dodecagon is 1,800 degrees
i hope i helped
Answer:
Step-by-step explanation:
5 1/2 ÷ 2 1/2
= 11/2 ÷ 5/2
= 11/2 × 2/5
= 11/5
= 2 1/5
132 in
Step-by-step explanation:
- Take the total radius = 18+3 = 21= R (say)
- Simply use the formula for the circumference i.e. 2*pi*R
- 2*22/7*21= 132