Question

Prove that the opposite angles of a parallelogram are congruent

Answer 1

can you prove that triangles ABD and BCD are congruent?

Answer 2

i dont know nothing about this stuff

Answer 3

congruent triangles?

Answer 4

what about them?

Answer 5

SSS,ASA,SAS do you know these?

Answer 6

yeah
side side side?
angle side angle
side angle side

Answer 7

good,BC=AD(opposite sides of a parallelogram)
AB=CD(like above)
BD is a common side
=>the 2 triangles are congruent by SSS
=>angle 3=angle 1
similarly for angles 2 and 4

Answer 8

thank u for your help