Question

The figure below shows 3 intersecting lines.

Lines A-D, B-E, and C-F intersect at G. The angles A-G-F is 22 degrees, angle E-G-D is 88 degrees.

What is the measure of
?

A.

55°

B.

66°

C.

68°

D.

70°

Answer 1

Lines AD, BE and CF form three angles around G that add to 180° (choose the three angles on one side of the lines). Two of them are 22° and 88°, so the third is 180° − (22° + 88°) = 70°.

Answer: D (70°).