Question

two angles of a triangle are 30 degree and 45 degree .prove it obtuse angle​

Answer 1

Obtuse angle is 110 degree

Answer 2

Answer:

sum of all angles of triangle = 180°

30° + 45° + third angle = 180°

75° + third angle = 180°

third angle = 180° - 75°

third angle = 105°

Third angle is greater than 90° so it is an obtuse angled triangle because it has one obtuse angle , 105° .

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