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jaimes04
19.05.2020 •
Mathematics
FIRST TO ANSWER (CORRECTLY) GETS BRAINLIEST
I NEED HELP ASAP WE DIDN'T LEARN THIS :/
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Ответ:
A. 20°
Step-by-step explanation:
ΔABC's full internal angle measurements = 180°
m∠CAB = 80°
m∠ACB = 50°
m∠DBA = 30°
m∠DBC = ?
Add the measurements of the angles together, and subtract from the total:
m∠DBC = 180 - (80 + 50 + 30)
m∠DBC = 180 - (160)
m∠DBC = 20°
A. 20° is your answer.
~
Ответ:
∠DBC = 20°
Step-by-step explanation:
∠A + ∠C + ∠ABC = 180 { sum of all angles of triangle}
50 + 80 + ∠ABC = 180
130 +∠ABC = 180
∠ABC = 180 - 130
∠ABC = 50°
∠ABD + ∠DBC = ∠ABC
30 + ∠DBC = 50
∠DBC = 50 - 30
∠DBC = 20°
Ответ:
40
Step-by-step explanation: