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Need some help with this question in my math class

Need some help with this question in my math class-example-1
User Abhilashv
by
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1 Answer

1 vote

Answer:

m∠CAD is 100°

Explanation:

The angles of a triangle always add up to 180 degrees.


80+20+x=180

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! :)

User Bizness
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