Grade 8 Math · Topic guide
Geometry — Grade 8 Math
Explore transformations and their effects, use the Pythagorean Theorem, and reason about similarity and three-dimensional measurement.
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What you’ll learn
- Understand angle-angle similarity.
- Determine congruence using rigid motions.
- Dilate figures on coordinate plane.
- Perform reflections on coordinates.
Explore the skills
Choose an idea below to read a worked example and try one question.
- Understand angle-angle similarityUnderstand angle-angle similarity.
- Determine congruence using rigid motionsDetermine congruence using rigid motions.
- Dilate figures on coordinate planeDilate figures on coordinate plane.
- Perform reflections on coordinatesPerform reflections on coordinates.
- Perform rotations on coordinatesPerform rotations on coordinates.
- Perform translations on coordinatesPerform translations on coordinates.
- Understand dilationsUnderstand dilations.
- Find distance between coordinate pointsFind distance between coordinate points.
- Understand exterior-angle relationshipsUnderstand exterior-angle relationships.
- Solve parallel-line/transversal angle problemsSolve parallel-line/transversal angle problems.
- Find missing right-triangle sidesFind missing right-triangle sides.
- Understand Pythagorean theoremUnderstand Pythagorean theorem.
- Apply theorem to real situationsApply theorem to real situations.
- Understand reflectionsUnderstand reflections.
- Understand preserved lengths and anglesUnderstand preserved lengths and angles.
- Understand rotationsUnderstand rotations.
- Determine similarity using transformationsDetermine similarity using transformations.
- Understand translationsUnderstand translations.
- Understand triangle angle sumUnderstand triangle angle sum.
- Calculate cone volumeCalculate cone volume.
- Calculate cylinder volumeCalculate cylinder volume.
- Calculate sphere volumeCalculate sphere volume.