If two angles of a triangle are 90° and 30°, third angle is

50°

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75°

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40°

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60°

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Solution

The correct option is D 60°
We know,
The sum of 3 angles of a triangle equals to 180°

$∴ T h i r d a n g l e = 180 ° - (90 ° + 30 °) = 180 ° - 120 ° = 60 °$

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