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In the given parallelogram YOUR, ∠RUO = 120° and OY is extended to point S such that ∠SRY = 50°. Find ∠YSR. - Mathematics

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प्रश्न

In the given parallelogram YOUR, ∠RUO = 120° and OY is extended to point S such that ∠SRY = 50°. Find ∠YSR.

योग

उत्तर

Given, ∠RUO = 120° and ∠SRY = 50°

∠RYO = ∠RUO = 120°   ...[∵ Opposite angles of a parallelogram]

Now, ∠SYR = 180° – ∠RYO   ...[Linear pair]

= 180° – 120°

= 60°

In ΔSRY,

By the angle sum property of a triangle,

∠SRY + ∠RYS + ∠YSR = 180°

⇒ 50° + 60° + ∠YSR = 180°

⇒ ∠YSR = 180° – (50° + 60°)

⇒ ∠YSR = 180° – 110°

∴ ∠YSR = 70°

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अध्याय 5: Understanding Quadrilaterals and Practical Geometry - Exercise [पृष्ठ १५७]

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एनसीईआरटी एक्झांप्लर Mathematics [English] Class 8
अध्याय 5 Understanding Quadrilaterals and Practical Geometry
Exercise | Q 150 | पृष्ठ १५७
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