Answer:
9 degrees
Step-by-step explanation:
A line is 180°, so the supplementary angel makes up the difference between. 180 - 60 = 120°
(3a-4b)²
= 9a² - 12ab + 16b²
Two triangles are similar if and only if all corresponding angles are equal (congruence), even if the corresponding sides are equal or not, therefore the answer is true because ΔJKL and ΔRST are similar and the statement above demands that "it must be", namely, this is a sufficient condition.
