The ratio of the measure of central angle PQR to the
measure of the entire circle is
The area of the shaded sector is 4 units
The area of the shaded sector depends on the length of
the radius.
The area of the shaded sector depends on the area of
the circle
The ratio of the area of the shaded sector to the area of
the circle is equal to the ratio of the length of the arc to
the area of the circle.

Idk i knew it a second ago

Step-by-step explanation:

but I forgot sry

did you get the answer yet?

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for