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.
D.If one angle of a triangle is larger than another angle, then the side opposite the larger angle is longer than the side opposite the smaller angle.
D. If one angle of a triangle is larger than another angle, then the side opposite the larger angle is longer than the side opposite the smaller angle.
