Question

THE FIGURE SHOWDSS ANGLE ABD IS 90° SLIPT BY LINE BC . THE MEASURE OF ANGLE ABC IS X ° AND THE MEASUREMENT OF DBC (3X+10) . WHAT IS THE VALUE OF X . ENTER YOUR ANSWER IN THE BOX

Answer 1

From the picture,

∠ABC + ∠DBC = ∠ABD

Substituting with data,

x + (3x + 10) = 90

4x + 10 = 90

4x = 90 - 10

4x = 80

x = 80/4

x = 20