Question

maths both ques please answer

Answer 1

Let angle A &B is 2x and ,7x
=>2x+7x=180°
=>9x=180°
=>x=20°
A=40° B=140°
C&D in2x&3x
=>5X=180°
=>x=36°
C=72° D=108°

Answer 2

(I) angleA : angleB = 2 : 7

let the constant ratio be 'x'

sum of the consecutive angles of parallelogram = 180°

2x + 7x = 180

x = 20

angleA = 2x = 2(20) = 40°

AngleB = 7x = 7(20) = 140°

(ii)
angleC = 2/ 3 of angle D

= 2D/ 3
angleC + angleD = 180°

(2D/3) + D = 180°

5D = 540 => D = 108°

AngleD = 108°

angleC = 2D/ 3 = 2(108)/ 3 = 72°