Answer:
∠? = 86°
Step-by-step explanation:
The two dashes on the sides of the triangle tell us that this is an isosceles triangle. An isosceles triangle has 2 congruent sides and one side that is different. The same goes for its angles. The angle opposite to these same sides are also the same. So the angle across from ∠47 is also 47°.
All the angles in a triangle add up to 180°, so all you have to do to find ∠? is to subtract 47 x 2 from 180:
180 - 47 - 47 = 86°
Hope this helps! Best of luck <3
