Question

what type of special triangle is this? equiangular 45°-45°-90° 30°-60°-90° equilateral

Explanation:

Step1: Analyze triangle properties

The triangle is formed by a diagonal of a square. In a square, all sides are equal. When a square is divided into two triangles by a diagonal, the two non - right angles of the triangle are equal. Since the sum of interior angles of a triangle is 180° and one angle is 90°, the other two angles are $\frac{180 - 90}{2}=45^{\circ}$.

Answer:

B. 45°-45°-90°