Question

What is not true about exterior angles?

a)They fall between a set of parallel lines when a transversal cuts through them.
b)In a set of parallel lines, exterior angles will be above one line and below the second line.
c)They can form linear pairs.
d)In a set of non-parallel lines, they are formed between the two lines

Answer 1

Exterior angles cannot form linear pairs because their measures cannot add up to 180 degrees.

Step-by-step explanation:

The correct answer is c) They can form linear pairs.

Exterior angles are formed when a transversal cuts through a pair of parallel lines. They are the angles formed on the outside of the parallel lines, like the angles shown in option b) above. Exterior angles can be classified as alternate exterior angles or corresponding exterior angles.

Linear pairs, on the other hand, are a pair of adjacent angles formed when two lines intersect. The sum of the measures of linear pairs is always 180 degrees. Therefore, exterior angles cannot form linear pairs.