Show that ABC is equilateral if
(i) ZA = x + 30°, ZB = 3x - 30° and ZC = 4x -60°.
(ii) ZA = x + 42°, ZB = 4x -12° and ZC = 3x +6°.
Show that A ABC is isosceles if
(i) ZA= 70° and Z B = 40°.
(ii) ZB = 30° and ZC = 120°.
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