Answer:
60
Step-by-step explanation:
The perimeter is the measurement around an object.
So first you multiply the 20 and the 10 by 2.
20 * 2 = 40
10 * 2 = 20
Then, add then up!
40 + 20 = 60
Answer:
The answer is All integers where n ≥ 1
Hope this helps!
Sec is 1/cos so sec -120 is 1/cos -120 which is -2
