Parallel Lines

From the figure, we know that

%5Cangle%20DAB%20%3D%2055%5E%5Ccirc

and since

%5Cangle%20DAB

and

%5Cangle%20DEC

are alternate interior angles (formed by the transversal

AB

and the parallel lines

DE

and

AB

), we can conclude that:

%5Cangle%20DEC%20%3D%2065%5E%5Ccirc

Thus, the correct answer is 65°.

Chapter Questions
1 MCQs