Find the measure of the exterior 21. 53°
1
42°
O A. 11°
O B. 127°
O C. 85°
O D. 95°

d) 95 degrees

Step-by-step explanation:

first figure out what the missing interior angle is:

180 - (53 + 42) = 85

then take the missing interior angle and subtract it from 180:

180 - 85 = 95

i dont know i just need points

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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