Mathematics, 15.10.2019 19:30, jaeybird9

given: abcd is a parallelogram.
prove: ∠a and ∠d are supplementary.

by the definition of a parallelogram, ab∥dc. ad is a transversal between these sides, so ∠a and ∠d are ? angles. because ab and dc are ? , the same-side interior angles must be ? by the same-side interior angles theorem. therefore, ∠a and ∠d are supplementary.

given: abcd is a parallelogram. prove: ∠a and ∠d are supplementary. by th

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given: abcd is a parallelogram.
prove: ∠a and ∠d are supplementary.

by the defin...