Question

4. ABCD is a trapezium in which AB || DC and
A = B = 40°. Find C and D. Are these
angles equal?​

Answer 1

Step-by-step explanation:

here the base angles are equal

ao quad abcd is isosceles trapezium

angle a = angle b

angle sum property of quad

angle a+ angle b+ angle c+ angle d=360

x+x+80=360

2x=280

x=140

Answer 2

Answer:

yes they are equal.

Step-by-step explanation:

taking AB and CD as line and AC as transversal

A = 40 ° , when we add And C we get 180 ( co interior angles )

A+C=180

40+C =180

C =180- 40

= 140

similarly B and D are Co interior angles so

D=140°

C = D