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
Construction image under homothety with compass and ruler. Find the image of line segment AB under the homothety with center O and ratio k = 2. Draw rays from point O through points A, B. With compass find point A' that line segment OA' is two times longer as OA. In the same way find point B'. Join points A' and B'. We get the image of the line segment AB under the homothety with center O and ratio k = 2.