### Video Transcript

Jacob and Mia are measuring
angles. Which of the two is correct, Jacob
or Mia? Jacob says, “The measure of the
angle is 70 degrees.” And Mia says, “The measure of the
angle is 110 degrees.”

Let’s look more closely at the
protractors and see who’s correct. Both children are measuring the
same angle, so we know that one of them has made a mistake. It looks like Jacob started
measuring here at zero. 10, 20, 30, 40, 50, 60, 70. This is why he thinks the measure
of the angle is 70 degrees. But we’re not trying to find the
measure of this angle. It looks like Jacob started in the
wrong place. There are two scales on our
protractor. It looks like Mia started at zero
on this scale, on the opposite side of the protractor. And she’s counted round to 110. 10, 20, 30, 40, 50, 60, 70, 80, 90,
100, 110. The measure of the given angle is
110 degrees. So, Mia is correct.