2/3 of 45 = 45*2/3 = 30
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one third of 45 is 15
If two sides of a triangle each have length of 45 units, then the triangle is isosceles,and the third side can have any length less than 90 units.
It is not possible to determine the measure of an angle if the lengths of two sides are given.
45
Assuming you mean the third angle of a triangle... 64 degrees.