This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
You're on a roll — Step 1: Find the interior angle BCA. Angles on a straight line sum to 180^. BCA + 125^ = 180^ BCA = 180^ - 125^ BCA = 55^ Step 2: Identify the type of triangle and its properties. The markings on sides AB and BC indicate that AB = BC. Therefore, ABC is an isosceles triangle. In an isosceles triangle, the angles opposite the equal sides are equal. BAC = BCA BAC = 55^ Step 3: Find the size of angle ABC using the sum of angles in a triangle. The sum of angles in a triangle is 180^. ABC + BAC + BCA = 180^ ABC + 55^ + 55^ = 180^ ABC + 110^ = 180^ ABC = 180^ - 110^ ABC = 70^ The size of angle ABC is: ABC = 70^ What's next?