Author: admin
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Angle bisector
An angle bisector is a ray that divides an angle into two congruent angles or two angles that have the same measure. For example, in the figure below, ray OB shown in red is an angle bisector and it divides angle AOC into two congruent angles. These two congruent angles are angle AOB and angle…
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Types of angles
There are many different types of angles and these can be classified based on the following characteristics. First, let us see what an angle is and then we will show all the different types of angles . What are angles? Notice that an angle is formed when two rays, also called arms of the angle,…
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Intersection of sets
This lesson will explain how to find the intersection of sets. We will start with a definition of the intersection of two sets. Definition: Given two sets A and B, the intersection is the set that contains elements or objects that belong to A and to B at the same time. We write A ∩…
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Union of sets calculator
A union of sets calculator that will help you find the union of two sets. Just enter your numbers in the box and click on the button that says calculate. This calculator accepts both negative and positive numbers.https://math.basic-mathematics.com/union-of-sets-calculator/union-of-sets-form.phpTips: Each set is separated with a semi column. Each element in a set is separated with a…
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Union of sets
This lesson will explain how to find the union of sets. We will start with a definition of the union of two sets. Definition: Given two sets A and B, the union of sets A and B is the set that contains elements or objects that belong to either A or to B or to both.…
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Subset of a set
This lesson will explain what a subset of a set is. We will start our lesson with a definition. Definition: Set B is a subset of a set A if and only if every object of B is also an object of A. We write B ⊆ A By definition, the empty set( { } or…
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Set-builder notation
A set-builder notation describes or defines the elements of a set instead of listing the elements. For example, the set { 1, 2, 3, 4, 5, 6, 7, 8, 9 } list the elements. The same set could be described as { x/x is a counting number less than 10 } in set-builder notation. We…
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Set notation
The different ways to write or define a set is called set notation. However, what is a set? Let us start with a definition of a set. Basically, anything with a collection of objects is a set. Here is an example of set made with odd and even whole numbers less than 10. You may…
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Number theory test
This number theory test will generate 25 questions from a pool of 40 well chosen questions. You need to answer 20 questions correctly to pass the test.This is the same as a score of 80%. The test will cover the following basic and important topics. These topics came from the lessons found on the number theory unit…
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Perfect number
What is a perfect number? A number is perfect if the sum of its proper factors is equal to the number. To find the proper factors of a number, write down all numbers that divide the number with the exception of the number itself. The proper factors of 18 are 1, 2, 3, 6, and…