In the given figure, $A B | | C D$ . if $∠ A O C = 30^{o}$ and $∠ O A B = 100^{o}$ , then $∠ O C D =$

130^{o}

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150^{o}

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80^{o}

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100^{o}

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Solution

The correct option is A $130^{o}$

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In the given figure, $A B | | C D, ∠ A B E = 120^{o}, ∠ E C D = 100^{o}$ and $∠ B E C = x^{o}$ . Find the value of $x$

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∠ O C D = 120^{\circ},

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In the adjoining figure, it is given that AB || CD, $∠$ BAO = 108 $^{\circ}$ and $∠$ OCD = 120 $^{\circ}$ then $∠$ AOC = ________.

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