Answer: Some advantages of using a number line to teach fractions include: Number lines help students see fractions as not only parts of a whole or parts or parts of a set, but as a part of distance or a part of time. Number lines help us compare fractions. Number lines help us find equivalent fractions
The last angle is 100°. A triangle is 180° and the two given angles are both 40°, meaning that 80°of the triangle is already given so the angle that's left is 100°.
