Question

Value of x in each of the following.
X+ 20°
2x
X
Exterior angle 120

Answer 1

Answer:

$As we know that exterior angle is the sum of interior opposite angles.Therefore(i) x=50°+70°=120°(ii) x=65°+45°=110°(iii) x=40°+30°=70°$

Step-by-step explanation:

Answer 2

Answer:

x = 70°

Step-by-step explanation:

the sum of angles in a quadrilateral is 360°.

(x + 20°) + 2x + x + 60° = 360°

x + 20° + 2x + x +60° = 360°

4x + 80° = 360

4x = 360° - 80° = 280°

x = 280° / 4 = 70°.

so, x = 70°.

verification :-

x + 20° + 2x + x + 60° = 360°

70° + 20° + (2×70)°+ 70° + 60° = 360°

90° + 140° + 130° = 360°

360° = 360°