Question

a quadrilateral has a 3 angle equal to 75 ° 75° degree and 110° find its unknown angle•

Answer 1

Answer:

Step-by-step explanation:

Let angle A be 75°

Angle B be 75°

Angle C be 110°

Angle D =?

A.T.Q

Angle A+Angle B+Angle C+Angle D= 360°. (Angle Sum Property of Quadrilateral)

75°+75°+110°+Angle D= 360°

150°+110°+Angle D= 360°

260°+Angle D= 360°

Angle D= 360°-260°

Angle D= 100°

Hence,proved

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