Question

Suppose ΔCED ≅ ΔDBC. If m∠EDC = 630 and m∠DBC = 820, what is m∠DCE?

A.63 degrees
B.82 degrees
C.145 degrees
D.35 degrees

Answer 1

I assume they are 63 degrees and 82 degrees.

Answer 2

Look at the picture and you will notice that angle DBC is same as angle DEC = 82 degrees. You now have two angles of the triangle. Calculate the third one.

Answer 3

180m = 630 + 820 + m∠DCE
180m - m∠DCE = 1450

Answer 4

Thank you