I'm assuming you're comparing two triangles? If not, then this is probably wrong.
Triangle = 180 degrees
180 divided by 3 = 60 degrees
since ∠1 ≅ ∠2 ≅ ∠3, each angle equal 60 degrees
∠4 ≅ ∠5
m∠4 = m∠3 + 10
m∠3 + 10 = m∠5
we know that m∠3 is 60 degrees.
60 + 10 = 70, so m∠5 is 70 degrees
70 degrees is the answer.
If the current is pointing into the page, the direction of the magnetic field will be upwards.
<h3>
What is direction of magnetic field?</h3>
The Maxwell right-hand thumb rule is used to indicate the direction of the magnetic field in the direction of the current or charge.
According to this rule, "if the thumb of the right-hand points along the direction of the current, then the remaining curled fingers of the same hand give the magnetic field direction due to the current".
Thus, when the current is pointing into the page, the direction of the magnetic field will be upwards.
Learn more about magnetic field here: brainly.com/question/7645789
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Merchandising. That is, if that is one of your answer choices. Chances are, they won't be selling the reef any time soon.