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Question
In the figure shown, reflection is taking place on a plane mirror then what will be the sum of x and y here in degrees?
In the figure shown, reflection is taking place on a plane mirror then what will be the sum of x and y here in degrees?
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Solution
The correct option is A 120
We know that the line joining the object and image is always perpendicular to the mirror so Angle B is 90 degrees
In triangle ABC
x= 60, since ( 180-(30+90)=60)
In triangle BCD
y= 60, since ( 180-(30+90)=60)
So x+y= 60+60= 120 degrees
We know that the line joining the object and image is always perpendicular to the mirror so Angle B is 90 degreesIn triangle ABC
x= 60, since ( 180-(30+90)=60)
In triangle BCD
y= 60, since ( 180-(30+90)=60)
So x+y= 60+60= 120 degrees
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