Answer:
54°
Step-by-step explanation:
Your triangle is isosceles. You have been given the third angle, and you have been asked to find the measure of one of the two equal angles. We know that the internal angles of a triangle sum to 180, so 
Median is the middle of the number set so
5 8 10 20 25 30 35 40 45
its 25
4+15+11+5+7+10= 50 cm
10cm was the missing one
First, isolate the x:
5x-2x= 2-3
Then solve!
3x= -1
x= -1/3
Hope this helps!