Answer:
<u>m∠CAD is 100°</u>
Step-by-step explanation:
The angles of a triangle always add up to 180 degrees.
![80+20+x=180](https://tex.z-dn.net/?f=80%2B20%2Bx%3D180)
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...
<u>m∠CAD is 100°</u>
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I hope my answer makes sense to you! :)
Start on the y axis at +1 (0,1), from there move up 3 and right 1 so the next point would be (1,4) then (2,7) and so on...