Question

1. Which of the following are true?
(i) A convex quadrilateral has all the angles less than 180°.
(ii) A concave quadrilateral has an angle greater than 180°
(iii) The sum of four angles of a quadrilateral is equal to five right angles.
(iv) A convex quadrilateral may have a reflex angle.​

Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Answer:

convex quadrilateral: A quadrilateral is called a convex quadrilateral, if the line segment joining any two vertices of the quadrilateral is in the same region. In a concave quadrilateral at least one angle is a reflex angle, i.e., an angle larger than 180°