Geometry lessons

305 skills 56 lessons

Brush up on important topics with IXL’s Geometry lessons! Once you're ready, start practicing what you've learned in one of IXL's skills.

Lines and line segments

  1. Midpoint formula
  2. Distance formula
  3. Perpendicular bisectors

Angles

  1. Complementary angles
  2. Supplementary angles
  3. Adjacent angles
  4. Vertical angles
  5. Angle bisectors

Parallel and perpendicular lines

  1. Transversals of parallel lines
  2. Equations of parallel and perpendicular lines

Triangles

  1. Interior angles of triangles
  2. Exterior angles of triangles

Quadrilaterals

  1. Properties of parallelograms

Three-dimensional figures

  1. Nets
  2. Cross sections

Congruence

  1. Congruence
  2. Proofs with congruent triangles

Transformations

  1. Transformations
  2. Translations
  3. Reflections
  4. Rotations
  5. Dilations

Symmetry

  1. Symmetry

Similarity

  1. Similarity
  2. Similar triangles
  3. Proofs with similar triangles

Right triangles and trigonometry

  1. The Pythagorean theorem
  2. The converse of the Pythagorean theorem
  3. Trigonometric ratios
  4. Solving right triangles

Area

  1. Area of triangles
  2. Area of parallelograms
  3. Area of rhombuses
  4. Area of trapezoids

Surface area and volume

  1. Surface area formulas
  2. Volume formulas
  3. Volume of prisms
  4. Volume of cylinders
  5. Volume of pyramids
  6. Volume of cones
  7. Volume of spheres

Circles

  1. Parts of a circle
  2. Area of circles
  3. Circumference of circles
  4. Arc length
  5. Radians
  6. Area of sectors
  7. Tangent to a circle
  8. Inscribed angles
  9. Inscribed circles
  10. Circumscribed circles

Circles and parabolas in the coordinate plane

  1. Equations of circles
  2. Parabolas

Probability

  1. Probability
  2. Compound probability
  3. Conditional probability