# In one isosceles triangle, the angle at the apex is 94 degrees, and in the other early-femoral triangle

July 23, 2021 | education

| **In one isosceles triangle, the angle at the apex is 94 degrees, and in the other early-femoral triangle, the angle at the base is 43 degrees. Are these triangles similar and why?**

The ABC triangle is isosceles, then its angles at the base of the AC are equal.

Angle BAC = BCA = (180 – ABC) / 2 = (180 – 94) / 2 = 86/2 = 43.

In triangle A1B1C1, the angle B1A1C1, by condition, is equal to 43, then the angle B1C1A1 = 430, and therefore, isosceles triangles ABC and A1B1C1 are similar in two angles, the first sign of similarity of triangles.

Answer: Triangles are similar in two corners.