The angles inside a triangle are called interior angles. The diagram below shows the interior and exterior angles of a triangle. The three interior angles in a triangle will always add up to 180°. At each corner the exterior and interior angles are on a straight line, so at each corner these two angles add up to 180°.
Answer:
9f-4b
Step-by-step explanation:
you add the two fs together and you add the two bs together to get the answer
I think it might be the last one. Hope it helps:)
