# Answer students' questions and become popular!

Algebra ->  Tutoring on algebra.com -> Answer students' questions and become popular!      Log On

 1. Provide the reasons for the proof. Given: Square ABCD, Diagonals and Prove: Angle DEC and Angle BEC are right angles. Problem Picture Link: http://i1139.photobucket.com/albums/n551/Ghost-1332/mathhelppic.jpg B.) Is line DC = to line BC? What property of a square is shown? C.) Is Line DE = BE? Which property of a parallelogram is shown? D.) Angle DEC = BEC? Which triangle congruence postulate is there? E. ) Is the Measurement of Angle DEC = to Measurement of angle BEC? Which definition of Congruence? F.) Is angle DEC supplementary to angle BEC? Which postulate? G.) Measurement of angle DEC + Measurement of angle BEC = 180 degrees? Which definition of supplementary angles is this? H.) Measurement of angle DEC + Measurement of angle BEC = 90 degrees? Which substitution and division property of equality? I.) If Angle Dec and Angle BEC are right angles which definition of a right angle are they? This feature of our site requires you to log in or register. Click here to register, it is free! Username: Password: Register in one easy step!. Reset your password if you forgot it.