Question

find the measure of all the angles of a paralellogram ABCD , if m angle D =60 degree.​

Answer 1

Step-by-step explanation:

We know that Opposite angle of the parallelogram are equal.

So,

⁂B=D=60 degree. and also adjacent angle are supplementary. So, A+B=180.

⁂A=180-60=120 degree.

⁂C=A=120 degree. [ Opposite angle are equal ] Hence, A=120 , B=60 , C=120 , D=60 degree(s)

Answer 2

angle a = 120° angle b = 60° angle c = 120° angle d = 60°

Step-by-step explanation:

in a parallelogram opposite angles are equal.

angle a = angle c and angle b = angle d

so, angle b = angle d = 60°(given)

angle a + angle b + angle c + angle d = 360°( ASP)

angle a + 60° + angle c + 60° = 360°

360° - 120° = 240°

angle a + angle c = 120°( 240 ÷ 2)

angle a = 120° angle b = 60° angle c = 120° angle d = 60°