Question

Can a quadrilateral ABCD be a parallelogram, give reasons in support of your answer.
(i) ∠A + ∠C = 180°?
(ii) AD = BC = 6 cm,AB = 5 cm and DC = 4.5 cm?
(iii) ∠B = 80° and ∠D = 70°?
(iv) ∠B + ∠C = 180°?
(v) AC = BD?

Answer 1

yes quadABCD be a llgm

• if opposite side are equal and parallel
• sum of adjacent angle is 180