Learning has become more unstructured as the basics have been covered. I will do another diagnostic in 2 days. Tomorrow will try keep doing problems and identifying weaknesses.

Today some useful rules:

- “like” vs. “as.” “Like” compares nouns, whereas “as” can modify an action or clause.
- The angle of an iscribed angle is half the angle of the arc it creates in the perimeter of circumference
- And rememebr that central angle that also has same arc as inscribed angle above, is twice the size of the inscribed angle.
- Neither has to be complemented by nor. Either by or. (n)either… (n)or…
- Its can refer only to a singular noun/precedent and A, B, C do not have it.
- GMAT Considers “whether….. ‘or not'” to be a stylistic error (redundancy)
- Elaborate on… needs that preposition.
- Two times is redudant. Best to say “twice”
- In Data Sufficiency problems involving averages, two parts of the average formula are needed to determine sufficiency.
- In problem solving seems diagrams are accurate and can be used to estimate (whenever using ballpark technique)
- Did some exercises that reinforced the concept of root 2 being 1.4 and root 3 being 1.7.
- Reinforced concept equilaterla triangle area is side squared multiplied by root 3 into 4.
- Reinforced concepts of special triangles. It is SO important to remember the rations 2:1:root(3) for 30-60-90 and 1:1:root(2) for 90-45-45.