These terms are not new concepts, most likely, but are probably terms that have only been introduced in Bulgarian.
This link is also a great resource to check out, as it gives examples of the types of problems students must be able to complete for the test.
SAT Math Section
Length: 70 minutes total (two 25-minute sections, one 20-minute section)
Format: multiple choice questions and grid-in questions (you provide your own answer in a bubble fill-in section)
Topics covered and Terms/ Concepts to know:
Numbers and Operations:
Percent (hundredths/ number out of 100)
Ratio
Proportions
Integers (Odd, Even, Prime numbers)
Digits and their places
Consecutive Integers
Odd/ even integers
Exponential growth
Algebra and Functions:
Substitution
Decimals
Fractions
Permutations
Exponents
Linear Equations
Inequalities
Quadratic Equations
Radical equations
Line equations
Absolute Value
Direct and Inverse Variation
Algebraic functions
Factoring
Variations
Functions
Radical
Geometry and Measurement:
Area
Perimeter
Circumference
Symmetry
Volume (of a box, cube, cylinder)
Pythagorean Theorem
Triangles and their properties (isosceles, equilateral, right triangles)
Parallel and Perpendicular lines
Slope
Similarity
Transformations
Different shapes (square, circle, rectangle, triangles, cylinders, cube, sphere, quadrilateral, parallelogram, cones, pyramids, polygon, pentagon, hexagon, etc)
Line segments
Rays
Vertex
Angles (and their relationships)
Corresponding angles
Congruent
Alternate interior angles
Interior angles
Supplementary/ complementary angles
Transversal
Base angles
Hypotenuse
sin(e), cos(ine), tan(gent)
Parallel lines
Proportional
Parabola
Data Analysis, Statistics, and Probability:
Arithmetic Mean/ Average
Median
Mode
Probability
Good luck studying, and if a student would like to help translate these terms into Bulgarian for future students, your help would be greatly appreciated!