Question

Please answer fast It is a question related to quadrilaterals Class9 Explain step by step

Answer 1

Step-by-step explanation:

angle c + angle d = 180 ==> 1

sum of angles of triangle DEC is 180

as DE and CE are bisector the they divide angles equally

1/2 angle c + 1/2 angle d + angle E = 180

1/2(angle c + angle d) + angle E = 180

from equation 1

1/2(180) + angle E = 180

90 + angle E = 180

angle E = 90