Mathematics, Grade 8 Assessable Academic Vocabulary Summary List for Grade 8 adjacent angles alternate exterior angles bias box-and-whisker plot chance circle graph collinear common solution complementary angles congruent continuous coordinate plane corresponding angles degrees diagonal direct variation discrete distance equiangular equilateral exterior angle frequency table histogram horizontal hypotenuse infer intercepts interior angle inter-quartile range intersect intervals irrational isosceles isosceles isosceles trapezoid leg likelihood linear equation linear pair maximum mean measures of center median minimum mode model no slope (undefined) origin outliers parallel parallel lines parallelogram perfect square population predict Pythagorean Theorem quadrilateral quartiles range rate of change rational rectangle rhombus right angle right triangle same-side interior angles scatter plot similar slope solution square statistics stem-and-leaf plot straight angle supplementary angles system of linear equations table transversal trapezoid vertical vertical angles x-intercept y-intercept Note: Greatest Common Factors, Least Common Multiples, Primes, Composites, and Prime Factorization, while not mentioned in the standards, are certainly appropriate for instruction beginning in grade 5 or 6. However, for assessment purposes, they may not be assessed by name. These concepts must be introduced through an explanation or a context. Mathematics Test Specifications and Test Blueprints 28 Oregon Department of Education Office of Assessment and Information Services