1.

In a quadrilateral angle s is equal to 150 degree and angle A = angle B = angle C​

Answer» ONG>Step-by-step EXPLANATION:

150 + x + x  +  x  = 360 \\ = 3x = 360 - 150 \\  = 3x = 210 \\  = x =  \frac{210}{3}  = 70

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