Which of the following angles can form a triangle ?

55^{\circ}

55^{\circ}

80^{\circ}

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33^{\circ}

74^{\circ}

73^{\circ}

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85^{\circ}

95^{\circ}

22^{\circ}

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60^{\circ}

70^{\circ}

50^{\circ}

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Solution

The correct options are
B $33^{\circ}$ , $74^{\circ}$ , $73^{\circ}$
D $60^{\circ}$ , $70^{\circ}$ , $50^{\circ}$
Sum of angles of a triangle is equal to $180^{\circ}$ .
$33^{\circ}$ + $74^{\circ}$ + $73^{\circ}$ = $180^{\circ}$ ; Sum of the angles is equal to 180° and hence can form a triangle.
$60^{\circ}$ + $70^{\circ}$ + $50^{\circ}$ = $180^{\circ}$ ; Sum of the angles is equal to 180° and hence can form a triangle.
$55^{\circ}$ + $55^{\circ}$ + $80^{\circ}$ = $190^{\circ}$ ;which is not equal to 180° and hence cannot form a triangle.
$85^{\circ}$ + $95^{\circ}$ + $22^{\circ}$ = $202^{\circ}$ which is not equal to 180° and hence cannot form a triangle.

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Find the mean of the following using step deviation method.

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