Find the perimeter of this semi-circle with diameter, d= 54cm. Give your answer as an expression in terms of π.

Step-by-step explanation:

Since the diameter is 54 cm, and the formula for the circumference(perimeter) of a circle is or , we can multiply 54 by pi to get the circumference of the entire circle. This is

Now, since we are finding the circumference of the semicircle, we just divide this by 2 to get .

Hope this helped!

Step-by-step explanation:

we can write 27π also

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.