jasaunm
jasaunm
30-11-2020
Mathematics
contestada
Can you help me with this? 7
Respuesta :
JennyTheBest813
JennyTheBest813
30-11-2020
Answer:
65º
Step-by-step explanation:
The angle of a straight line is 180º, so ∠ABD=180º and ∠ABC=(180-6x)º
The sum of the interior angles of a triangle is 180, so (x+40)º+(3x+10)º+(180-6x)º=180
We can solve from there, x+40+3x+10+180-6x=180
Combine like terms, -2x+230=180
Subtract 230, -2x=-50
Divide by -2, x=25
m∠CAB=(x+40)º=(25+40)º=65º
m∠ABC=(180-6x)º=(180-150)º=30º
m∠BCA=(3x+10)º=(75+10)º=85º
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