4 years ago

In this diagram, m DCB = ???

Mathematics

1 answer:

Elza [17]4 years ago

7 0

Answer:

56°

Step-by-step explanation:

The two marked angles are supplementary, so total 180°.

(2x +8) +(x -2) = 180

3x +6 = 180 . . . . . . . . . . collect terms

x + 2 = 60 . . . . . . . . . . . divide by 3

x = 58 . . . . . . . . . . . . . . subtract 2

∠DCB = x-2 = 58 -2

∠DCB = 56

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In this diagram, m DCB = ???​

In this diagram, m DCB = ???