Geometry

300 skills 57 lessons 254 videos

IXL offers hundreds of Geometry skills to explore and learn! Not sure where to start? Go to your personalized Recommendations wall to find a skill that looks interesting, or select a skill plan that aligns to your textbook, state standards, or standardized test.

IXL offers hundreds of Geometry skills to explore and learn! Not sure where to start? Go to your personalized Recommendations wall to find a skill that looks interesting, or select a skill plan that aligns to your textbook, state standards, or standardized test.

F. Triangles review

  1. 1
    Classify triangles
  2. 2
    Triangle Angle-Sum Theorem
  3. 3
    Exterior Angle Theorem
  4. 4
    Exterior Angle Inequality

J. Symmetry

  1. 1
    Line symmetry
  2. 2
    Rotational symmetry
  3. 3
    Draw lines of symmetry
  4. 4
    Count lines of symmetry

K. Congruent figures review

  1. 1
    Congruence statements and corresponding parts
  2. 2
    Solve problems involving corresponding parts
  3. 3
    Identify congruent figures
  4. •
    New! Determine if two figures are congruent: justify your answer

P. Pythagorean theorem

  1. 1
    Pythagorean theorem
  2. 2
    Prove the Pythagorean theorem
  3. 3
    Converse of the Pythagorean theorem
  4. 4
    Pythagorean Inequality Theorems

R. Laws of Sines and Cosines

  1. 1
    Law of Sines
  2. 2
    Law of Cosines
  3. 3
    Solve a triangle
  4. 4
    Area of a triangle: sine formula
  5. 5
    Area of a triangle: Law of Sines
  6. Checkpoint skill
    Checkpoint: Laws of Sines and Cosines

Geometry lessons

These lessons help you brush up on important math topics and prepare you to dive into skill practice!

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
  3. Triangle inequality theorem

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