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Sagot :
Question 1
- The mistake is that vertical angles are congruent, and don't always add up to 180 degrees.
- [tex]5x=100 \longrightarrow x=20[/tex]
Question 2
- Angles that add to form a right angle add to 90 degrees, not 180 degrees.
- [tex]3x+39=90 \longrightarrow 3x=51 \longrightarrow x=17[/tex]
Question 3
- Angles that add to form a right angle add to 90 degrees, not 180 degrees.
- [tex]3x+39=90 \longrightarrow 3x=51 \longrightarrow x=17[/tex]
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