Answer:
Step-by-step explanation:
Determine the determinant
Multiply / Remove parentheses
Calculate
What is the slope of this graph ?
2 answers:
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Answer:
∠ DFC = 80°
Step-by-step explanation:
See the attached figure.
Since BFE is a straight line so, ∠ BFA + ∠ AFE = 180°
Now, ∠ AFE is given to be 125°.
So, ∠ BFA = 180° - 125° = 55°
Now, AFD is a straight line. So, ∠ BFA + ∠ BFC + ∠ DFC = 180°
⇒ 55° + 45° + ∠ DFC = 180° {Since, ∠ BFC is given to be 45°}
⇒ ∠ DFC = 180° - 55° - 45° = 80° (Answer)
