Congruency

• bonkysleuth

  31 Jul 09, 21:11

  In the diagram, triangle ABC is congruent to triangle DCE. DE = 15 cm and CE = 12 cm

  

  Find angle ACB.

  I can get the answer if angle ECD = 90 deg. But I can't prove that. Can someone help me out with this? Or maybe there are some other methods? thankyou

• ThunderFbolt

  31 Jul 09, 21:49

  think the question you got is incomplete, cos you can't prove that right angle.