Answer:
Hi there! I believe your answer will be D, 156°.
Step-by-step explanation:
This is because a triangle must equal 180° and you already have the degrees of two of the sides. To get the other side you need to add up the two sides, 88°, 68°, and subtract that number from 180, hencefore, receiving the number 156°.
I hope your inquiry is solved and you will better understand it for future questions.
I hope you have a great rest of your day!
