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Evaluate expressions containing absolute values

by Dr. Osama M. Khaled — published May 08, 2026 — last modified May 09, 2026 04:26 AM — filed under: Year 8

We use the order of operations rule to evaluate more complicated expressions that contain absolute values.

Located in Mathematics / … / Integers / Order of Operations and Estimation

Evaluate expressions containing grouping symbols

by Dr. Osama M. Khaled — published May 07, 2026 — last modified May 09, 2026 04:26 AM — filed under: Year 8

When evaluating expressions,we must perform all calculations within parentheses and other grouping symbols first.

Located in Mathematics / … / Integers / Order of Operations and Estimation

Exercise 1: Vocabulary

by Dr. Osama M. Khaled — published Dec 11, 2023 — last modified Jul 12, 2024 10:18 PM — filed under: Year 8 Located in Mathematics / Algebra / Equations to Solve Application Problems

Find the area of a circle

by Dr. Osama M. Khaled — published May 17, 2026 — last modified May 17, 2026 07:57 PM — filed under: Year 8

The area of a circle represents the total two-dimensional space enclosed within its curved boundary

Located in Mathematics / Geometry / Circles

Find the area of a polygon

by Dr. Osama M. Khaled — published May 16, 2026 — last modified May 16, 2026 10:23 PM — filed under: Year 7, Year 8

The area of a polygon is the measure of the amount of surface it encloses. Area is measured in square units, such as square inches or square centimeters

Located in Mathematics / Geometry / Perimeters and Areas of Polygons

Find the circumference of a circle

by Dr. Osama M. Khaled — published May 17, 2026 — last modified May 17, 2026 03:53 AM — filed under: Year 8

Since early history, mathematicians have known that the ratio of the distance around a circle (the circumference) divided by the length of its diameter is ...

Located in Mathematics / Geometry / Circles

Find the percent of increase or decrease

by Dr. Osama M. Khaled — published Dec 24, 2024 — last modified May 12, 2025 06:16 AM — filed under: Year 7, Year 8, Year 9

Percents can be used to describe how a quantity has changed

Located in Mathematics / … / Percent / Applications of Percent

Find the volume of rectangular solids, prisms, and pyramids

by Dr. Osama M. Khaled — published May 18, 2026 — last modified May 18, 2026 08:57 PM — filed under: Year 8, Year 9

The volume of a three-dimensional figure is a measure of its capacity

Located in Mathematics / Geometry / Volume

Identify corresponding parts of congruent triangles

by Dr. Osama M. Khaled — published Nov 20, 2025 — last modified Nov 27, 2025 08:53 AM — filed under: Year 8

Simply put, two geometric figures are congruent if they have the same shape and size.

Located in Mathematics / Geometry / Congruent Triangles and Similar Triangles

Inside Plasma Membrane

by Dr. Osama M. Khaled — published Jul 17, 2022 — last modified Jul 13, 2024 10:18 PM — filed under: Year 8

Cytoplasm and Nucleoplasm

Located in Biology / Cell Structure

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