Question

in the adjoining figure angle a =angle b and angle c=angle d Prove that angle b+angle c=90 degree​

Answer 1

Answer:

It's true

Step-by-step explanation:

By angle sum property of quadrilateral...

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

angle b + angle b + angle c + angle d = 360°

2( angle b + angle c ) = 360°

angle b + angle c = 360° /2

angle b + angle c = 180°

Hence prooved..