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प्रश्न
In the given diagram, ABC is a straight line. If y =`1 1/2` right angles; find x.
उत्तर
From figure again,
x + y = 180°
1 + `3/2 xx 90` = 180°
⇒ x + `1 1/2` right angles = 180°
⇒ x + `3/2 xx 90 = 180°`
⇒ x + 135°= 180°
⇒ x= 180° – 135°
⇒ x = 45°
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