In an isosceles triangle, the base angles are congruent. Needed the height of an equilateral triangle for a sewing project so I could compute what size square to cut for making 1.5 inch wide bias strips when using a diagonal cut of the square. Similarly, side BC reflects to side AB. It is not possible for a triangle to have more than one vertex with internal angle greater than or equal to 90°, or it would no longer be a triangle. Even then, I can not find all the angles in terms of x and y. Create an acute triangle. Triangle Similarity Theorems Since an equilateral triangle has 3 equal sides and 3 equal angles (60 degrees), the b will be what you're solving for. Similarity in mathematics does not mean the same thing that similarity in everyday life does. Find the sum the of AC and the difference between the two sides is less than the third, AB – BC < AC. 60° each which are acute angles. Its three angles are also equal and they are each 60º. An equilateral triangle is a triangle that has sides that are all equal in length. Answer: Since the triangle is equilateral, all the angles are 60 degrees. 3. In geometry, an equilateral triangle is a triangle in which all three sides are equal. Explain. I tried to solve this problem by making