Question

In a parallelogram abcd angle a =70 degree then measure angle b and angl;e c

Answer 1

Let angle b and c be x and the other angle d=a=70° so, ATQ, 70+70+x+x=360 by solving this equation x=110 thus, angleb=angle c=110°

Answer 2

by following the rule...
=>The sum of adjacent angle of parellelogram are 180.

angle A+angleB=180

70+angleB=180

angleB=180-70

angleB=110

=>opposite angles of a parallelogram are equal.

so, angle A=angleC

angleC=70