Question

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Answer 1

Answer:

x=34

Step-by-step explanation:

here angleOAC and angleOAB are linear pair of angles

therefore OAC+OAB=180 -1

OAC=5y+21

=146(since y=25) -2

substuiting eq2 in eq1

146+OAB=180

x =180-140

x=34

Answer 2

Step-by-step explanation:

AngleDAC + AngleDAB = 180°(linear pair)

Angle DAC = (5y + 21)°

y=25° , so

5y + 21 = [(5×25)+21]°

=125+21

=146°

Angle DAC + Angle DAB =180°

Angle DAB=180-146

2x=34°

x = 34/2 =17°

x = 17°