Answer:
m<2 + m<3
Explanation:
Theorem:
In a triangle, the measure of an exterior angle is equal to the sum of the measures of its remote interior angles.
<4 is an exterior angle of the triangle.
Angles 2 and 3 are the remote interior angles of <4.
m<4 = m<2 + m<3
Answer: m<2 + m<3