A triangle with two congruent sides and congruent base angles is termed as _____.

An isosceles triangle is one with two congruent sides and two congruent base angles.

If two sides of a triangle are congruent, then the angles opposite these sides are also congruent due to the isosceles triangle property.

That is, the triangle's base angles are congruent.

An isosceles triangle is a name given to this type of triangle.