Answer:
≥ closed dot
< open dot
≤ less than or equal to closed dot
There are the missing blanks
The answer is C because the angle equal each other.
Both of the other angles are 40° because a triangle has a total angle of 180° and an isosceles triangle means that at least two of the sides have to be the same length (two angles must be the same)
180 - 100= 80
80 ÷ 2 = 40
Umm...
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