Ankush prepared a poster in the form of a parallelogram, as in the figure. (i) If ∠A=(5x+7)∘ and ∠B=(3x−3)∘, find all the angles of parallelogram ABCD. (ii) Which mathematical concept is used in this question? (iii) By writing a slogan on the poster, which value is depicted by Ankush? [4 MARKS]

Ankush prepared a poster in the form of a parallelogram, as in the fig

1.	Ankush prepared a poster in the form of a parallelogram, as in the figure. (i) If ∠A=(5x+7)∘ and ∠B=(3x−3)∘, find all the angles of parallelogram ABCD. (ii) Which mathematical concept is used in this question? (iii) By writing a slogan on the poster, which value is depicted by Ankush? [4 MARKS]
Answer» Ankush prepared a poster in the form of a parallelogram, as in the figure. (i) If $∠ A = (5 x + 7)^{\circ}$ and $∠ B = (3 x - 3)^{\circ}$ , find all the angles of parallelogram ABCD. (ii) Which mathematical concept is used in this question? (iii) By writing a slogan on the poster, which value is depicted by Ankush? [4 MARKS]