mathinschool.com
numbers and algebraic expressions
logic, sets, intervals
absolute value
function and its properties
linear function
quadratic function
polynomials
rational function
exponential function
logarithm
number sequences
limits of sequences and functions
derivative and integral of functions
trigonometry
plane geometry
analytic geometry
solid geometry
combinatorics
probability
elements of statistics
kropki game
Drawing the circle. Drawing the diameter. Drawing the radius OA at right angle to the diameter. Find the center of the radius (point B). Place one leg of the compass to point B and draw arc through the point A. The line segment AC has length of side of regular pentagon. Draw pentagon.