Question

find the size of unknown angles​

Answer 1

Answer:

x = 75°

Step-by-step explanation:

∠ACD + ∠BCD = 180° [Sum of angles on a straight line = 180°]

x + x + 30 = 180°

2x + 30 = 180°

2x = 180 - 30

2x = 150

x = $\frac{150}{2}$

x = 75°

Answer 2

x+x+30° = 180° [ Linear pair ]

2x+30° = 180°

2x = 180 °- 30°

2x = 150°

$x = \frac{150}{2}$

x = 75°

Therefore x angle = 75°

and , x + 30° = 105°

Hope it helps friend !

#Be brainly