In triangle ABC, angle A = 54, angle B = 63. Which side of the triangle is the largest?

As we know from the school geometry course, in a triangle, the sum of all angles is 180 °.

Let us determine what the angle C of our triangle will equal, if from the condition of the task we know that the angle A is 54 °, while the angle B is 63 °:

180 – 54 – 63 = 63.

As we know, from the school geometry course, in such a figure opposite a larger angle there is a large side.

Determine which side in the triangle is the largest:

54 <63;

63 = 63.

Answer: The triangle is isosceles. It has 2 largest sides – AB and AC.