Classify the pair of angles.

a
b
c
d

i chose a, correct me if i'm wrong.

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

The longer leg of a 30° 60° 90° triangle is 16 times square root of three how long is a shorter leg

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?