Question

The three angles of a quatinateral are 60.80 and 120 find the fourth angle
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Answer 1

Answer:

100°

Step-by-step explanation:

let the fourth angle be x

ATQ,

x+60°+80°+120°=360° {angle sum property of quadrilateral}

=>x+260°=360°

=>x=360°-260°

=>x=100°

therefore, the fourth angle is 100°.

Answer 2

${\boxed{\boxed{\red{\mathcal{CORRECT\: QUESTION:}}}}}$

• The three angles of a quadrilateral are 60°, 80° and 120°. Find the fourth angle.

${\boxed{\boxed{\red{\mathcal{ANSWER:}}}}}$

• 4th angle of quadrilateral is 100°.

Given:

• Three angle of quadrilateral are 60°, 80° and 120°.

To Find:

• Find Forth angle.

${\boxed{\boxed{\red{\mathcal{SOLUTION:}}}}}$

We know that, sum of all angles of quadrilateral is 360°.

$\implies$Angle A + Angle B + Angle C + Angle D = 360°

$\implies$ 60° + 80° + 120° + Angle D = 360°

$\implies$ 260° + Angle D = 360°

$\implies$ Angle D = 360° - 260°

$\implies$ Angle D = 100°

Hence, 4th angle of quadrilateral is 100°.