Question

Two angle of a triangle are 30 and 60 find the third angle

Answer 1

Answer:

There are 3 angles in triangle so if one is 30 other is 60 that's why last and third one is 90

Answer 2

Answer:

Let the 3rd ∠ be x

∠30° + ∠60° + ∠x° = 180°      {ANGLE SUM PROPERTY OF TRIANGLE = 180°}

∠90° + ∠X° =180°

∠X°= ∠180° - ∠90°

∠X°= ∠90°

THIS MEANS THAT THE  TRIANGLE IS A Right - Angled Triangle .