Question

In a quadrilateral PQRS
,∠P=70
, ∠Q=70
, ∠R=55
. Find the measure of ∠S. What kind of a
quadrilateral is it?
Convex or Concave?
Give reasons.

Answer 1

Step-by-step explanation:

Angle S = 165 Degree

but I can't understand the convex or concave

Sorry

Answer 2

Step-by-step explanation:

given a quadrilateral PQRS, where

Angle P = 70

Angle Q=70

Angle R=55

Now , by the angle sum property of a quadrilateral,we have

angle P+angle Q+angle R+angle S =360

70+70+55+angle S =360

Angle S =360 - 195

angle S=165

it is convex quadrilateral because it's measure is 165 and it is smaller than 180