Can someone help me solve this And what does complementary,
supplementary, vertical,
And adjacent angles mean!?!?!

angle 6 and 5.

complementary means 2 angles whose sum is 90° and supplementary means 2 angles whose sum is 180°. a way to remember is that is: c(from complementary) is way before s(from supplementary) in the alphabet so you know that complementary has the smaller amount. adjacent angles share the same endpoint of and angle and vertical angles are pairs of the opposite angles made by intersecting lines

the answer is a

step-by-step explanation:

because if you put 1 in to the square root of x it equals 300.