Answer: Option C.
Step-by-step explanation:
1. Apply the Pythagorean Theorem to calculate AB:

2. Now, you can calculate the angle ∠A as following:

Where:

Then:

∠
°
3. The sum of the interior angles of a triangle is 180°. So, you can find the angle ∠B as following:
∠
°-∠A-∠C
∠
°-
°-
°=
°
4. Therefore, the answer is the option c.
Suj of the interior angles of any triangle equal to 180° thus :






Yes, Mary is correct as all of the numbers in the sequence are not divisble in 3.
Hope this helps!
Answer:
someone help me out here. It is really confusing
Step-by-step explanation: