I assume you mean curve touching? It means that two or more curves intersect at a single point (tangent point).
Adjacent means two objects touching immediately next to each other without any intervening space.
principal(in terms of math)- the amount you borrow or deposit
A comparison in math terms is when you see if two problems are equal to each other.
A math expression is a collection of math terms
this: /
how many
ask your math teacher
sum means the answer of a math problem
Justification in math terms means to show how you solved the math problem. Lay out the problem and show step-by-step how the problem is solved.
when you have a right triangle and one of the two non-right angles is theta, sin(theta) is the side of the triangle opposite theta (the side not touching theta) divided by the side that does not touch the right angle
In terms of what?
how many