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Sagot :
Answer:
since those are angles on a straight line.
we work out as follows
- x+126°=180°
- x+126°-126°=180°-126°
- x=54°
∠DBA and ∠DBC are making linear pair.
Linear pair of angles are formed when two lines intersect each other at a single point.
- The sum of angles of a linear pair is always equal to 180°
[tex]\rm \large\longrightarrow \: \: x \: + \: 126 \degree \: = \: 180 \degree[/tex]
[tex]\rm \large\longrightarrow \: \: x \: = \: 180 \degree \: - \: 126 \degree [/tex]
[tex]\rm \large\longrightarrow \: \: x \: = \: 54 \degree[/tex]
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