proportional segments 34 videos

Distance Formula
Geometry Pythagorean Theorem
How to derive the equation for the distance between two points using the Pythagorean Theorem.
distance coordinate plane ordered pair segment 
Distance Formula
Trigonometry Pythagorean Theorem
How to derive the equation for the distance between two points using the Pythagorean Theorem.
distance coordinate plane ordered pair segment 
Similarity Shortcuts
Geometry Similarity
How to determine if two triangles are similar using a shortcut.
similar triangles AA SAS SSS proportion congruence 
Corresponding Parts of Similar Triangles
Geometry Similarity
How to relate corresponding altitudes, medians and angle bisectors in similar triangles.
similar triangles altitude median angle bisector proportional 
Angle Bisectors and Opposite Side Ratios
Geometry Similarity
How to relate the sides of an angle bisected and the lengths of the opposite side.
angle bisector opposite side ratio proportion 
Indirect Variation
Algebra 2 Functions
How to define indirect variation.
indirect variation inverse proportion constant of variation 
Special Isosceles Triangle Properties
Geometry Triangles
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
isosceles triangle angle bisector altitude median 
Constructing Altitudes
Geometry Constructions
How to define an altitude and draw them on acute, right, and obtuse triangles.
altitudes perpendicular segment vertex opposite side obtuse acute right triangles 
Secants
Geometry Circles
How to define a secant; how to find the length of various secants in circles.
secant intercepted arcs proportion arc measure tangent chord 
Properties of Similar Polygons
Geometry Similarity
How to identify if two figures are similar.
similar figures corresponding angles congruence corresponding sides proportional 
ACT PreAlgebra
ACT ACT Math
Short, helpful video on ACT prealgebra by top ACT prep instructor, Devorah. Videos are produced by leading online education provider, Brightstorm.
Pre algebra order of operations percents proportions ratios mean median mode 
Calculating the Midpoint
Geometry Geometry Building Blocks
How to find the midpoint of a segment with endpoints in rectangular coordinates, How to write the midpoint formula.
endpoint coordinate plane 
The Geometric Representation of Vectors
Precalculus Vectors and Parametric Equations
How to understand what vectors are, and how they can be represented geometrically.
Magnitude Direction Scalar Vector Directed Line Segment Initial Point Terminal Point