Question

In quadrilateral ABCD, A = 60°, B = 80° and C = 65°. Find the measure of D. Is this a
convex quadrilateral ?​

Answer 1

Answer:

measure of d will be 155 degree

Answer 2

Step-by-step explanation:

given,

In quadrilateral ABCD,

angle A = 60 degree,

angle B = 80 degree,

angle C = 65 degree

angle D=?

sum of interior angles in a quadrilateral is 360°

60+80+65+?=360

?=360-205

angle D=155°

convex quadrilateral is the quadrilateral in which the opposite angles make 180°

angleA+angleC

and

angleB +angleD

does not make 180°

so, it is not a convex quadrilateral

hope it helps u ✌