Question

1. what is the sum of the angles in any triangle regardless of its type? 180° 90° 360° 120°

Explanation:

The sum of the interior angles of a triangle is a fundamental geometric property. This can be proven through various methods such as drawing a parallel line to one side of the triangle and using the properties of alternate - interior angles. For example, if we have a triangle \(ABC\) and draw a line parallel to \(BC\) through \(A\), we can show that the three angles of the triangle (\(\angle A\), \(\angle B\), \(\angle C\)) add up to \(180^{\circ}\).

Answer:

\(180^{\circ}\)