Answer:
B=55°
Explanation:
That is an isosceles triangle TS and US are the same size. So the 2 angles at the base (TU) will be the same. so b=55°
ok this triangle is an isosceles triangle because when you tell sit and look at the base sides that is 55° and be those are the base angles so if one is 55 the other one is also 55 So B is 55
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