Cubles

8th grade geometry practice

Free 8th grade geometry problems covering the Pythagorean theorem, distance on the coordinate plane, transformations, and volume of cylinders, cones, and spheres. Instant feedback, worked-out steps, and a fresh problem every time — no sign-up, and it works great on a phone.

// Cubles Brain Blocks: Geometry
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Questions

What geometry do 8th grade students learn?

In 8th grade, geometry covers the Pythagorean theorem, distance on the coordinate plane, transformations, and volume of cylinders, cones, and spheres. Cubles Brain Blocks lets students practice all of it free, one problem at a time, with worked-out steps.

Is this 8th grade geometry practice free?

Yes — every problem is free with no sign-up and no ads, and a new one is generated each time so it never runs out.

Common Core standards covered
  • 8.G.A.1Verify experimentally the properties of rotations, reflections, and translations (lines to lines, segments to congruent segments, angles to congruent angles, parallel lines to parallel lines).
  • 8.G.A.2Understand that a figure is congruent to another if obtainable by a sequence of rotations, reflections, and translations; describe such a sequence.
  • 8.G.A.3Describe the effect of dilations, translations, rotations, and reflections on two-dimensional figures using coordinates.
  • 8.G.A.4Understand that a figure is similar to another if obtainable by a sequence of rotations, reflections, translations, and dilations; describe such a sequence.
  • 8.G.A.5Use informal arguments to establish facts about the angle sum and exterior angle of triangles, the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity.
  • 8.G.B.6Explain a proof of the Pythagorean Theorem and its converse.
  • 8.G.B.7Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in two and three dimensions.
  • 8.G.B.8Apply the Pythagorean Theorem to find the distance between two points in a coordinate system.
  • 8.G.C.9Know the formulas for the volumes of cones, cylinders, and spheres and use them to solve real-world and mathematical problems.
Practice by grade
Kindergarten1st grade2nd grade3rd grade4th grade5th grade6th grade7th grade8th grade
Practice by topic
Area of a triangleArea of a rectangleArea of a parallelogramArea of a trapezoidPerimeter practiceVolume of a rectangular prismSurface area practiceArea of a circleCircumference of a circleVolume of a cylinderVolume of a coneVolume of a spherePythagorean theorem practiceAngles practiceCoordinate plane practice2D shapes practice

Geometry you can hold

Cubles kits are geometry in your hands: nets, faces, edges and vertices that fold and click into a poseable 3D character. No scissors, no glue, about 15 minutes.

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