1. (i) Find x + y + z
plz tell me
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x = 90°
z = 150°
& y = 180 -120 => 180-60 => 120°
So, x+y+z= 90+120+150
= 360
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Answered by
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☞︎︎︎ Solution :
★ Let given angles be
- A = 90°
- B = 30°
- C = ?
★ we know ,
- Angles along a straight line = 180°
★ Finding x
⇒ ∠A + ∠x = 180°
⇒ 90° + x = 180°
- On Transposing The Terms :
⇒ x = 180° - 90°
∴ x = 90°
★ Finding z
⇒ ∠B + ∠z = 180°
⇒ 30° + z = 180°
- On Transposing The Terms :
⇒ z = 180° - 30°
∴ z = 150°
➢ To find y we need C
➪ We know,
- Angle Sum Property :
☞︎︎︎ The sum of 3 interior angles of triangle = 180°
⇒ ∠A + ∠B + ∠C = 180°
⇒ 90° + 30° + C = 180°
⇒120° + C = 180°
- On Transposing The Terms :
⇒ C = 180° - 120°
∴ C = 60°
- Now,
⇒ ∠C + ∠z = 180°
⇒ 60° + z = 180 °
- On Transposing The Terms :
⇒ z = 180° - 60°
∴ z = 120°
➢ Here,
- x = 90°
- y = 150°
- z = 120°
★ Finding x + y + z
⇒ 90° + 150° + 120°
∴ x + y + z = 360°
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