• Home
• Log in
• My Exams
• My Account

• Math Help
• About Us
• Subscription Info
• Create Test
• School Subscriptions
• Testimonials
• Parents
• FAQ

• Algebra Help
• Geometry Help
• Trigonometry Help
• Precalculus Help
• Calculus Help

• ALGEBRA HELP
• GEOMETRY HELP
• TRIGONOMETRY HELP
• PRECALCULUS HELP
• CALCULUS HELP

Geometry Help

The geometry category of math help covers the beginning geometry skills. Click any geometry concept below to view a complete lesson. These geometry lessons support the questions (each having their own video solution) in our vast database. After viewing a lesson, we recommend that you create a personalized question-set in order to practice and evaluate your learning.

Geometry Help

• Topic A: Introduction to Geometry: Angles, Lines and Triangles
  • Concept 1: Properties of real numbers {A.N.1}
  • Concept 2: Definitions in geometry {G.G.1}
  • Concept 3: Complementary, supplementary and vertical angles {G.G.1}
  • Concept 4: Triangles;segments associated with triangles {G.G.21,30,47}
• Topic B: Mathematical Reasoning and Logic
  • Concept 1: Connectives in logic; and, or, not, if...then, if and only if {G.G.24,25,26,27}
  • Concept 2: Inverse, Converse, Contrapositive {G.G.24,25,26,27}
• Topic C: Working with Postulates and Definitions
  • Concept 1: Reflexive, symmetric,transitive,substitution {G.G.1}
  • Concept 2: Addition, Subtraction, Mult. & Division {G.G.1}
  • Concept 3: Using postulates and definitions in proofs {G.G.1}
  • Concept 4: Using angle theorems in proofs {G.G.1}
• Topic D: Proving Triangles Congruent: SSS, ASA, SAS; Isosceles and Equilateral Triangles
  • Concept 1: Congruent triangles; SSS, SAS, ASA {G.G.28,29;G.PR.2}
  • Concept 2: Corresponding parts of congruent triangles {G.G.29}
  • Concept 3: The isosceles and equilateral triangles {G.G.31}
  • Concept 4: Overlapping triangles {G.G.28,29;G.PR.2}
• Topic E: Parallel Lines; Interior and Exterior Angles of Polygons
  • Concept 2: Proofs with Parallel and Perpendicular Lines {G.G.35}
  • Concept 1: Solving problems involving parallel lines {G.G.35}
  • Concept 3: The sum of the measures of the a Angles of a triangle {G.G.36}
  • Concept 4: Interior & exterior angles of a triangle {G.G.36,37}
  • Concept 5: Interior & exterior angles of a polygon {G.G.36,37}
• Topic F: AAS; Hy- Leg; Inequalities in a Triangle; Indirect proofs
  • Concept 1: AAS and HY-Leg Method {G.G.28}
  • Concept 2: Indirect proofs {G.RP.8}
  • Concept 3: Inequalities in the Triangle; Inequality Proofs {G.G.32,33,34}
• Topic G: Quadrilaterals: Parallelograms & Trapezoids; Proofs with Parallelograms
  • Concept 1: The parallelogram (algebraic problems) {G.G.38}
  • Concept 2: The rectangle, square, rhombus and trapezoid (algebraic problems) {G.G.39,40,41}
  • Concept 3: Proofs involving quadrilaterals {G.G.38,39,40,41}
• Topic H: Proportions & Similar Triangles; Proofs involving Similar Triangles
  • Concept 1: Ratio and proportion {A.A.25,26;A.N.5}
  • Concept 2: Proportions in similar triangles and polygons {G.G.42}
  • Concept 3: Proportions in the Right Triangle; Altitude to hypotenuse {G.G.47}
  • Concept 4: Proving Triangles Similar; Proving Proportions & Products {G.G.44,45,46}
• Topic I: The Pythagorean Theorem; Special Right Triangles
  • Concept 1: The Pythagorean Theorem {G.G.48}
  • Concept 2: Special Right Triangles: 30-60-90 and 45-45-90
• Topic J: Coordinate Geometry; Slope and Equations of Lines; Systems of Equations
  • Concept 1: Slope of a line {G.G.62}
  • Concept 2: Equation of a line {G.G.64,65,68}
  • Concept 3: Graphing linear equations; point on a line {G.G.64,65}
  • Concept 4: Distance between two points {G.G.67}
  • Concept 5: The midpoint of a line segment {G.G.66}
  • Concept 6: Parallel and perpendicular lines {G.G.62,63}
  • Concept 7: Proofs in coordinate geometry {G.G.69}
  • Concept 8: Areas in coordinate geometry
  • Concept 9: Systems of Equations {G.G.70}
• Topic K: Transformation Geometry: Reflections, Translations, Dilations, Rotations
  • Concept 1: Line reflections and line symmetry {G.G.55}
  • Concept 2: Dilations {G.G.58,59,61}
  • Concept 3: Rotations {G.G.57,61}
  • Concept 4: Point reflections and point symmetry {G.G.54,55,60}
  • Concept 5: Translations {G.G.57,61}
  • Concept 6: Isometries and Orientation {G.G.54,55,60}
  • Concept 7: Compositions of Transformations {G.G.58}
• Topic L: Plane and Solid Geometry; Volume; Surface & Lateral Area
  • Concept 1: Three Dimensional Geometry: Points, Lines, Planes {G.G.2-10}
  • Concept 2: Surface and Lateral Area {G.G.13,14,15,16}
  • Concept 3: Volumes of Solids {G.G.11-16}
  • Concept 4
• Topic M: Circles: Equation, Area, Circumference; Angles and Segments; Circle Proofs
  • Concept 1: Equation of a circle {G.G.71,72,73,74}
  • Concept 2: Area and circumference {A.G.1}
  • Concept 3: Measures of arcs and angles:central angles {G.G.49,51,52}
  • Concept 4: Measure of inscribed angles {G.G.51}
  • Concept 5: Measures of angles formed by tangents, chords and secants {G.G.49,50}
  • Concept 6: Measures of chords,tangents and secants {G.G.49,50,53}
  • Concept 7: Circle Proofs
• Topic N: Locus, Intersection of Loci; Loci in Coordinate Geometry
  • Concept 1: Locus theorems {G.G.21,22,23}
  • Concept 2: Intersection of loci; loci in coordinate geometry {G.G.21,22,23}
• Topic O: Basic Geometric Constructions; Concurrency in a Triangle
  • Concept 1: Basic Constructions {G.G.17,18,19,20}
  • Concept 2: Concurrency in the Triangle {G.G.43}

• Copyright © 2012 Math Right Now, Inc. All rights reserved.
• About Us
• FAQ
• Contact Us
• Sitemap