Question

The angles of a quadrilateral ABCD are angle A = 30°, angle B = 60°, angleC = 75°. What is the measure of
angle D ? State whether the quadrilateral is concave or convex.​

Answer 1

Answer:

D=195°

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Step-by-step explanation:

angles in a quadrilateral = 360°

60+75+30+D=360

165°+D=360

D=360-165

D=195°

Answer 2

Step-by-step explanation:

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