Which fact helps you prove the isosceles triangle theorem, which states that the base angles of any isosceles triangle have equa
l measure? a. The base angles of an equilateral triangle have equal measure.
b. If two sides of a triangle are equal, the third side must be equal to the others.
c. If a triangle is equiangular, then it is equilateral.
c. If one angle of a triangle is larger than another angle, then the side opposite the d. larger angle is longer than the side opposite the smaller angle.
D- <span> If one angle of a triangle is larger than another angle, then the side opposite the d. larger angle is longer than the side opposite the smaller angle.</span>