Look at the figure shown below.

Triangle AEC is an obtuse angled triangle. Side AC of the triangle is extended till B so that AC is equal to CB. D is a point on the left of E. Points D and C and points D and B are joined using straight lines. Angle DCA is equal to angle ECB. Angle EAC is equal to angle DBA.

A student made the table below to show the steps to prove that DC is equal to EC.

Statements Justifications

AC = BC

Given

m∡EAC = m∡DBC

Given

m∡ACD = m∡BCE

Given

m∡ACE = m∡ACD + m∡DCE

Angle Addition Postulate

m∡BCD = m∡BCE + m∡DCE

Question

Look at the figure shown below.

Triangle AEC is an obtuse angled triangle. Side AC of the triangle is extended till B so that AC is equal to CB. D is a point on the left of E. Points D and C and points D and B are joined using straight lines. Angle DCA is equal to angle ECB. Angle EAC is equal to angle DBA.

A student made the table below to show the steps to prove that DC is equal to EC.

Statements 	Justifications

    AC = BC

	Given

    m∡EAC = m∡DBC

	Given

    m∡ACD = m∡BCE

	Given

    m∡ACE = m∡ACD + m∡DCE

	Angle Addition Postulate

    m∡BCD = m∡BCE + m∡DCE

anonymous · Answer

I dont know how to start this! can someone plz help

anonymous · Answer

attachment

anonymous · Answer

http://www.scribd.com/doc/46511625/Geometry-Part-1 thins might help you to understand XD

anonymous · Answer

THANK YOU!

anonymous · Answer

no problem but if you need help as this guy his user name is "dpaInc"