عالم الرياضيات

Percentages: Definition of percentages, methods of converting between fractions, decimals, and percentages, calculating the percentage of a number, and using percentages in discounts, interest, and various statistics.

Area and Circumference of a Circle: Definition of a circle, radius and diameter, formula for the area of ​​a circle, formula for the circumference of a circle, and solving practical problems calculating the area or circumference when one of them, or the radius or diameter, is known.

Circumference of a Circle: Explanation of the formula for the circumference of a circle in more than one form, using the diameter or radius, and solving various problems that demonstrate how to substitute into the formula.

Order of Operations: Explanation of the order of operations (parentheses, exponents, multiplication and division, addition and subtraction), with examples illustrating the step-by-step solution method and common errors that occur when the order of operations is neglected.

Perimeter and Area of ​​a Square: Definition and properties of a square, the formula for the perimeter of a square, the formula for the area of ​​a square, and how to find one when the other is known, with simple practical problems.

Area of ​​a Square: Explanation of the concept of area in general, then focusing on the area of ​​a square using the side length or the diagonal length, with everyday examples such as calculating the area of ​​a garden or a parking space.

Area of ​​a Circle: The different formulas for calculating the area of ​​a circle when the radius, diameter, or perimeter is known, with illustrative examples for each case and how to choose the appropriate formula.

Conversion from Feet to Meters: Explanation of the relationship between feet and meters, conversion formulas in both directions, and practical problems such as converting the heights of people, the lengths of corridors, and the altitude of airplanes.