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In this animated activity, learners read the definition of a parallelogram and then find the perimeter and area of parallelograms in practice problems.
Operations with Zero
By Allen Reed, Douglas Jensen
Learners review the basic math operations involving zero, emphasizing that division by zero is undefined. Examples are given.
Solving Systems of Linear Equations Using the Addition or Subtraction Method
In a series of practice problems, learners use the addition or subtraction method to solve systems of linear equations, also called "simultaneous linear equations."
Fundamental Laws of Algebra
Learners review the fundamental laws of algebra including the commutative law of addition, the commutative law of multiplication, the associative law of addition, the associative law of multiplication, and the distributive law. Examples are given.
Strength of Materials: The Centroid of a Circle
By Steve Whitmoyer
In this animated and interactive object, learners calculate the area and centroid of a circle.
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