Write a two-column proof for the following conjuncture. you may not need to use all of the rows of the two-column table provided below. you may also add additional rows if needed given parallelogram abcd
(given 7 columns on assignment)

prove: angle a and angle b are supplementary
angle b and angle c are supplementary.

Given ABCD be a parallelogram

Then, AD // BC and AB is a transversal.

Because of the sum of the interior angles on the same side of the transversal is 180°

So, ∠A + ∠B = 180°

∴ Angle A and angle B are supplementary.

Also,

AB // CD and CB is a transversal.

Because of the sum of the interior angles on the same side of the transversal is 180°

So, ∠B + ∠C = 180°

∴ Angle B and angle C are supplementary.

the bottom of the spinner is not flat.

step-by-step explanation: