Question

In an quadrilateral PQRS. angle P= 70°, angle Q= 90°, angle R= 55°. Find the measure of angle S. What kind of quadrilateral is it, convex or concave​

Answer 1

Step-by-step explanation:

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Answer 2

∠P+∠Q+∠R+∠S=360°

⇒50° + 50°+60°+∠S=360°

∠S = 200° , which is greater than 180°

Concave quadrilaterals are quadrilaterals that have one interior angle that exceeds 180 °

Therefore , the quadrilateral PQRS is concave.