Question

Two angles of a triangle XYZ are 30° and 80°. Find the third angle.​

Answer 1

Answer:

$30 + 80 + x = 180$

$110 + x = 180$

$x = 180 - 110$

$x = 70$

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Answer 2

Answer:

Angle X + Angle Y + Angle Z = 180° (Angle sum property of a triangle)

30° + 80° + Angle Z = 180°

110° + Angle Z = 180°

Angle Z = 180° - 110°

☆Angle Z = 70°