37 points solve with a decent amount of explanation

There are 10 Triangles in total, they all have equal arms (two arms) & their one angle is equal. We can conclude, at-least they all are isosceles. So, out of 10 those triangles, none of them are non-isosceles.

Hope this helps!

This is what i found “an explicit formula designates the nth term of the sequence, as an expression of n (where n = the term's location). it defines the sequence as a formula in terms of n. this example is an arithmetic sequence(the same number, 5, is added to each term to get to the next term).” i hope this you for what your looking for. can you plz mark me brainliest?