Geometry Topics

Print out a Free Savvy Minds Geometry Notecard for a summary of an entire Geometry course. The Online Math Learning website has a comprehensive list of geometry terms, formulas and concepts while Freemathhelp.com has a selection of video lessons. Select a text based lesson or lesson link below.

Basic Geometry Terms
points , lines , line segments , midpoints , rays , planes , space

Pairs of Lines
intersecting lines , parallel lines , perpendicular lines , skew lines

Angles
naming an angle , measuring an angle , angles around a point

Types of Angles
right angles , acute angles , obtuse angles , straight angles

Pairs of Angles           
complementary angles , supplementary angles , vertical angles ,
alternate interior angles , alternate exterior angles , corresponding angles

Types of Triangles
right triangles , acute triangles , obtuse triangles , equilateral triangles ,
isosceles triangles , scalene triangles

Special Right Triangles
3-4-5 triangles , 45°-45°-90° triangles , 30°-60°-90° triangles

Pythagorean Theorem   

Congruent Triangles      
SSS rule , SAS rule , ASA rule , AAS rule

Similar Triangles            
AA rule , RAR rule

Triangle Inequality
triangle inequality theorem , angle-side relationship

Quadrilaterals          
parallelograms , rhombus , rectangles , squares , trapezoids

Polygons                
sum of angles in a triangle , dividing polygons into triangles ,
formula for sum of angles

Areas of Polygons        
squares , rectangles , parallelograms , triangle , rhombus , trapezoids

Perimeters of Polygons
squares , rectangles , parallelograms , triangle , rhombus , trapezoids

Circles
diameter , radius , arc , tangent , circumference , area

Arcs and Chords                 
Major and minor arcs and chords.

Volume and Surface Area      (Basics)   (Intermediate)
cubes , rectangular solids , prisms , cylinders , spheres , cones , pyramids ,
nets of solids

Coordinate Geometry       
coordinate plane , slopes , y-intercept , equation of a line , negative slope ,
slopes of parallel lines , slopes of perpendicular lines , midpoint formula ,
distance formula

Trigonometric Ratios      
Sine, Cosine, Tangent

Law of Sines         

Law of Cosines        

Translating Graphs         

All content linked to from this page is created and maintained by OnlineMathLearning.com and Freemathhelp.com and not affiliated with this website. Links are provided as a convenience. If you decide to access the OnlineMathLearning.com or Freemathhelp.com websites you do so within their terms of use.