1.

Q4. Find the value of Y in the following figure.​

Answer»

Answer:

B] 65°

Step-by-step EXPLANATION:

Concept used:

The Sum of all angles around a POINT is always 360°.

Solution:

Applying the above concept,

50° + 40° + 130° + (2y + 10)° = 360°

⇒ 90° + 130° + 2y + 10° = 360°

⇒ 230° + 2y = 360°

⇒ 2y = 360° - 230°

⇒ 2y = 130°

⇒ y = 65°

∴ The value of y in the given figure = 65°

KNOW MORE:

Angle sum Property states that sum of all angles in a triangle is always 180°.

This is known as Angle Sum Property.

Similarly in a QUADRILATERAL, sum of all angles is equal to 360°.


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