Question

In ∆ABC, the bisector AD of A is perpendicular to side BC, Show that AB - AC and AABC is isosceles.
(b) In the figure, AB = AC, ZACD: 115, then find angle BAC​

Answer 1

Answer:

Angle A=50

Step-by-step explanation:

∠ACB + ∠ACD = 180° (Supplementary angles)

∠ACB + 115 = 180 °

∠ACB = 180° - 115°

∠ACB = 65°

∠B = ∠C = 65° (Isosceles triangle property)

IN ΔABC,

∠A + ∠B + ∠C = 180° (Angle Sum Property)

∠A + 65° + 65° = 180°

∠A + 130° = 180°

∠A = 180° - 130°

∠A= 50°