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Lines And Angles

Question
CBSEENMA9002373

It is given that ∠XYZ = 64° and XY is produced to point P. Draw a figure from the given information. If ray YQ bisects ∠ZYP, find ∠XYQ and reflex ∠QYP.

Solution

∵ Ray YZ stands on line PX
∴ ∠XYZ+ ∠ZYP = 180°
| Linear Pair Axiom

⇒ 64° + ∠ZYP = 180°
| ∵ ∠XYZ = 64° (Given)
⇒    ∠ZYP = 180° - 64°
⇒    ∠ZYP = 116°    ...(1)
because  Ray YQ bisects angle ZYP
therefore space space angle PYQ equals angle ZYQ equals 1 half angle ZYP equals 1 half left parenthesis 116 degree right parenthesis
                                              | Using (1)
              = 580                                ...(2)
 therefore space space angle QYP space equals space 360 degree space minus 58 degree space equals space 302 degree
left enclose because The sum of all the angles round apoint is equal to 3600
Again,  angle XYZ space angle XYZ plus angle ZYQ
                 = 640 + 580
vertical line space because space angle XYZ equals 64 degree (Given) and angle ZYQ equals 58 degree

                                             [ From (2) ]
                   = 1220