Find the unknown angles marked in each of the following figures.
If you know then only answer.
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❎ Wrong answer will be marked as brain list.
Answers
Answer:
(I) x° + 80° + 25° = 180°
x° = 180° - 105°
x° = 75°
(ii) 2x + 6x + x = 180°
9x = 180°
x = 20°
all angles are 20°,120°,40°.
(iii) x + x + 40° = 180°
2x + 40° = 180°
2x = 180 - 40
2x = 140°
x = 70°
all angles are 70°,70°,40°.
(iv) 3x + 2x + 90° = 180°
5x + 90° = 180°
5x = 180° - 90°
5x = 90°
x = 18°
all angles are 18°,36°,54°.
(v) angle BAC = 70° ( exterior angle property)
Now, we know that the exterior angle of any ∆ is equal to the sum of its opposite two interior angles.
So, According to this,we have
➡️ x° + 70° = 120°
➡️ x° = 120° - 70°
➡️ x° = 50°
(vi) In ∆ ABC,
➡️ 75° + 65° + angle ACB = 180°
➡️ 140° + ACB = 180°
➡️ ACB = 180° - 140°
➡️ ACB = 40°
Now, Angle ACB = Angle DCE
➡️ 40° = 40°
By using Angle sim property of triangle,we have
In ∆ DCE,
➡️ x° + 110° + 40° = 180°
➡️ x° = 180° - 150°
➡️ x° = 30°
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Answer:
Step-by-step explanation:
2+44x2
Thrice the number 3+
5+44x2