Answer: 83
Step-by-step explanation:
A triangle is always 180 degrees
You know the measure of 2 angles (44 and 53). You need the 3rd.
180 - 44 - 53 = 83
Answer- vertical;congruent
Estimation involves rounding
3/8 is closest to 4/8 which is 1/2, or 6/12
6/12 + 1/12 = 7/12
that is the estimated answer
I got 12 on my calculator