• #### Parallel Planes and Lines - Concept

##### Math›Geometry›Geometry Building Blocks
How to identify parallel lines, a line parallel to a plane, and two parallel planes.
• #### Parallel Planes and Lines - Problem 1

##### Math›Geometry›Geometry Building Blocks
How to identify the intersection of two planes.
• #### Three Undefined Terms: Point, Line, and Plane - Concept

##### Math›Geometry›Geometry Building Blocks
How to describe and label point, line, and plane. How to define coplanar and collinear.
• #### Math Content Review III

##### Test Prep›ACT›ACT Math
Short, helpful video on ACT Geometry by top ACT prep instructor, Devorah. Videos are produced by leading online education provider, Brightstorm.
• #### Calculating the Midpoint - Problem 1

##### Math›Geometry›Geometry Building Blocks
How to find the midpoint of a segment using the midpoint formula given the endpoints.
• #### Calculating the Midpoint - Problem 3

##### Math›Geometry›Geometry Building Blocks
How to find the endpoint of a segment using the midpoint formula given the midpoint and the other endpoint.
• #### Calculating the Midpoint - Problem 4

##### Math›Geometry›Geometry Building Blocks
How to use the midpoint formula to find an endpoint of a segment, when given the coordinates of the midpoint and the other endpoint.
• #### Calculating the Midpoint - Problem 2

##### Math›Geometry›Geometry Building Blocks
How to use the endpoints of a line segment and the midpoint formula to find the midpoint of the line segment.
• #### Calculating the Midpoint - Concept

##### Math›Geometry›Geometry Building Blocks
How to find the midpoint of a segment with endpoints in rectangular coordinates, How to write the midpoint formula.
• #### Distance Formula - Problem 1

##### Math›Geometry›Pythagorean Theorem
How to find the distance between two points on the coordinate plane using the distance formula.
• #### Rectangle and Square Properties - Problem 2

##### Math›Geometry›Polygons
How to find the point of intersection of the diagonals of a rectangle in a coordinate plane.
• #### Distance Formula - Concept

##### Math›Geometry›Pythagorean Theorem
How to derive the equation for the distance between two points using the Pythagorean Theorem.
• #### Rotations - Problem 4

##### Math›Geometry›Transformations
How to rotate a point about the origin a given degree measure in the coordinate plane.
• #### Compositions of Transformations - Problem 3

##### Math›Geometry›Transformations
How to identify the transformation of a reflection across two lines in a coordinate plane.
• #### Locus and Definition of a Circle and Sphere - Concept

##### Math›Geometry›Circles
How to define a circle and a sphere using the word locus.
• #### Dilations - Problem 1

##### Math›Geometry›Transformations
How to find the scale factor of a dilation given two figures on a coordinate plane.
• #### Distance Formula - Problem 2

##### Math›Geometry›Pythagorean Theorem
How to identify a polygon (a triangle in this problem) as isosceles, equilateral, or scalene using the distance formula.
• #### Glide Reflections - Problem 1

##### Math›Geometry›Transformations
How to perform a glide reflection on a triangle in the coordinate plane given a translation rule and a line to reflect over.
• #### Locus and Definition of a Circle and Sphere - Problem 1

##### Math›Geometry›Circles
How to find the locus of points that are equidistant from the endpoints of a segment.
• #### Locus and Definition of a Circle and Sphere - Problem 2

##### Math›Geometry›Circles
How to find the locus of points that are equidistant from the sides of an angle.