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Learn: Area and Perimeter
iGCSE Mathematics
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Welcome!Today we’ll explore Area and Perimeter. These concepts are essential for solving real-world problems like designing spaces or fencing gardens. Let’s dive in!
What is Area?Area measures the space inside a shape. It’s calculated using specific formulas depending on the shape, such as length × width for a rectangle. Area is expressed in square units, like cm² or m².
What is Perimeter?Perimeter is the distance around the outer edge of a shape. It’s calculated by summing up the lengths of all its sides. Perimeter is expressed in linear units like cm or m.
Quick check: Which of the following measures the space inside a shape?
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Formulas for RectanglesThe formula for area of a rectangle is length × width. For perimeter, add all four sides: 2 × (length + width).
Match the items on the left with their correct pairs on the right
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Formulas for TrianglesThe formula for the area of a triangle is ½ × base × height. The perimeter depends on the sum of all three sides.
Match the items on the left with their correct pairs on the right
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CirclesFor a circle, the area formula is π × radius², and the perimeter (circumference) formula is 2 × π × radius.
The area of a circle is calculated using the formula π × {{blank0}}².
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Compound ShapesTo find the area or perimeter of compound shapes, divide them into simpler shapes like rectangles or triangles, calculate their measurements, and combine the results.
Which of the following are true about compound shapes? (Select all that apply)
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Real-World ApplicationsUnderstanding area and perimeter is helpful for tasks like painting walls, laying flooring, or fencing gardens. For example, knowing the area ensures you buy enough materials.
Quick check: If a rectangle has a length of 10 m and width of 4 m, what is its perimeter?
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Review Time!Great work! You’ve learned about area and perimeter for various shapes. Now let’s test your understanding with a few questions.
Match the items on the left with their correct pairs on the right
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Which of the following are true about circles? (Select all that apply)
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Match the items on the left with their correct pairs on the right
Start the lesson to answer this matching question
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