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I DONT UNDERSTAN THIS CAN SMEOME PLEASE HELP

I DONT UNDERSTAN THIS CAN SMEOME PLEASE HELP-example-1

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Explanation:

a = 113 Due to vertical angles theorem ...pairs of opposite angles of two crossing lines share the same value

b= a = 113 due to corresponding angles of parallel lines that are crossed by a transversal

User GabrielVa
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