Question

Find the unknown in each of the following figures.

Answer 1

Answer:

55° , 65° and 60° respectively.

Step-by-step explanation:

Here,

x + 30° + x + 40° + 2x + 10° = 180° [ Since, Straight angle ]

⇒x + x + 2x + 30° + 40° + 10° = 180°

⇒4x + 80° = 180°

⇒4x = 180° - 80°

⇒x = 100°/4

⇒x = 25°

Hence, the unknown angles are :

• x + 30° = 25° + 30° → 55°
• x + 40° = 25° + 40° → 65°
• 2x + 10° = 2 × 25° + 10° = 50° + 10° = 60°.

Answer 2

Answer:

55 degree, 65 degree and 60 degree