16 docs tagged with "Grade 9"

Learn the distance formula with clear derivation, 5 worked examples, and practice problems. Find the distance between any two points on a coordinate plane.

Learn the slope formula, how to calculate rise over run, and identify positive, negative, zero, and undefined slopes. Grade 8–9 algebra with step-by-step examples.

Learn how to graph linear equations using slope-intercept form y = mx + b and by finding x and y intercepts. Step-by-step examples for Grade 8–9 students.

Learn how to solve linear equations step by step with clear theory, worked examples, common mistakes, and practice problems for grades 7-9.

Understand negative exponents, learn the reciprocal rule, and practice simplifying expressions with negative powers. Step-by-step examples for grades 8-9.

Learn the Pythagorean theorem with clear explanations, a visual proof, worked examples, and practice problems for grades 8-9.

Practice the Pythagorean theorem with 5 worked examples and answers. Find missing sides, verify right triangles, and solve real-world problems step by step.

Solve real-world Pythagorean theorem word problems step by step. Ladders, navigation, construction, and sports — with full worked solutions for grades 8-9.

Learn what Pythagorean triples are, see a list of common triples, and discover how to generate new ones using a simple formula. Worked examples and practice for grades 8-9.

Learn how to solve quadratic equations by factoring and using the quadratic formula, with worked examples and practice for grade 9 students.

Learn how to draw and interpret scatter plots, identify positive and negative correlation, draw a line of best fit, and make predictions from data.

Learn scientific notation step by step — how to convert numbers, multiply, divide, and add in scientific notation. Worked examples and practice for grades 8-9.

Learn the difference between similar and congruent triangles, the SSS, SAS, ASA, and AA similarity tests, and how to find missing sides using proportions.

Learn how to calculate the surface area of prisms, cylinders, pyramids, cones, and spheres with clear formulas, worked examples, and practice.

Learn how to solve systems of two linear equations using substitution and elimination, with step-by-step examples, word problems, and practice for grade 8-9.

Learn the volume formulas for prisms, cylinders, pyramids, cones, and spheres with worked examples. Step-by-step guide for Grade 8–9 geometry students.