Respuesta :

meghna300

Answer:

108°

Step-by-step explanation:

In a quadrilateral,the sum of all the internal angles is 360°

From question,

3x+4x+2x+x=360°

or,10x=360°

or,x=36°

Therefore, angle A=3x=3*36°=108°

Answer:

B

Step-by-step explanation:

The sum of the interior angles in a quadrilateral is 360°

Sum the given angles and equate to 360, that is

3x + 4x + 2x + x = 360

10x = 360 ( divide both sides by 10 )

x = 36

Hence

∠A = 3x = 3 × 36° = 108°

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