FOR 26 POINTS HELP. In the model of a house, the front-facing gable at the end of the roof forms an isosceles triangle where the diagonal sides of the gable are congruent in length. Which statement is true?
A. the length of the horizontal side of the gable is half the lengthof the sum of the two diagonal sides
b. the base angles of the gable are also congruent
c. the base angles of the gable have a sum of 180
d.the length of the horizontal side of the gable is equal to the sum of the lengthsof the two diagonal sides