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Hello! I'm leaving you a video, before taking the test, anti-nerves! If you follow me on tiktok, help me continue helping, thanks! https://www.tiktok.com/@laura_ensena/... In this video, we see how to find out the value of x (unknown) by posing an equation and thus being able to establish the measurement or amplitude of the interior angles of the triangle. To correctly pose the equation, we base ourselves on the fact that the sum of the interior angles of a triangle is always equal to 180 ° and that isosceles triangles have two equal sides and two equal angles. Equal angles are those that have one of the sides equal and the other unequal. I am attentive to your questions and I invite you to leave suggestions for topics for future videos in the comments! Remember that there are no stupid questions but fools who don't ask!