Question

if abcd is a isosceles trapezium then sum of its interior opposite angles​

Answer 1

the sum of interior opposite angle is always greater than third

Answer 2

180° due to co interior angle properties for a two parallel lines

there are 4 angles : a,b,c,d

/_A=/_B {isosceles angle}

/_A+/_D= 180° {co interior angle}

/_A+/_B+/_C+/_D=360° {Sum of quadrilateral}

/_A+/_A+/_D+/_C=360°

/_A+180°+/_C=360°

/_A+/_C=180°. (proved)