Answer:
m∠CAD is 100°
Step-by-step explanation:
The angles of a triangle always add up to 180 degrees.
[tex]80+20+x=180[/tex]
Add...
100+x=180
Subtract 100 from each side...
x=80°
m∠CAB=80
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A line is always 180°... line DB consists of m∠CAB (just solved) and m∠CAD (which the answer asks)
m∠CAB+m∠CAD=DB
Substitute in the information we have.
80°+m∠CAD=180°
Subtract 80 from both sides...
m∠CAD is 100°
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I hope my answer makes sense to you! :)
