(খ) (১২
÷৩+২)(৮x৪ ÷ ৪+২)
Answers
Given:
Three angles of the quadrilateral are 50°, 130° and 120°.
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To find:
Fourth angle of the quadrilateral.
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Solution:
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☯ Let fourth angle of quadrilateral be x.
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As we know that,
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Sum of all angles of a quadrilateral is 360°.
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Therefore,
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➯ 50° + 130° + 120° + x = 360°
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➯ 300° + x = 360°
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➯ x = 360° - 300°
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➯ x = 60°
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∴ Hence, Fourth angle of the quadrilateral is 60°.
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★Moretoknow★
Quadrilateral: - "Quad" means four and "lateral" means sides. All closed figures with four sides are called quadrilaterals.
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★ Properties of quadrilateral:
4 vertices and 4 sides enclosing 4 angles
2 - dimensional closed figure.
The sum of all interior angles of a quadrilateral