Nov. 27 1997 Homework

Definition: Isosceles triangle–A triangle in which two sides have the same length.

1.

Given DABC is an isosceles triangle with side AB @ side BC.

Prove that BAC@–BCA

2.

Given DABC, Ray AD bisects BAC, Ray CD bisects BCA, Line EF is parallel to segment AC and passes through D.

Prove that DADE and DCFD are isosceles.