=
A
C
F
xº
E
G
80°
160°
D
B
1 answer:
The value of angle ∠AEF or ∠x is 80°.
<h3>
What are angles?</h3>
- When two straight lines or rays intersect at a common endpoint, an angle is formed.
- An angle's vertex is the common point of contact.
- The term angle is derived from the Latin word angulus, which means "corner."
- The basic angles are Acute angle, Obtuse angle, Right angle, Straight angle, reflex angle, and full rotation.
So,
- ∠CEB is 160° with EG being an angle bisector leaving ∠CEG = 80° and ∠BEG = 80°
- FEG is a straight line with ∠FEG being 180°.
- ∠FED + ∠DEB + ∠BEG = ∠FEG
- 80° + ∠DEB + 80° = 180°
- 160° + ∠DEB = 180°
- ∠DEB = 180° - 160°
- ∠DEB = 20°
Then,
- ∠AEC = 20° = ∠DEB (Inversely opposite angles)
Now,
- FEG is a straight line with ∠FEG being 180°.
- ∠CEG + ∠AEC + ∠AEF = ∠FEG
- 80° + 20° + ∠AEF = 180°
- 100° + x = 180°
- x = 180° - 100°
- x = 80°
- ∠AEF = 80°
Therefore, the value of angle ∠AEF or ∠x is 80°.
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