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Introduction to Perimeter and Area:

- Define what perimeter and area are for plane shapes.
- Explain the difference between them and their importance in geometry.

Triangles:

- Discuss different types of triangles (e.g., equilateral, isosceles, scalene).
- Introduce formulas for calculating the perimeter and area of triangles.
- Provide examples and step-by-step calculations for each type of triangle.

Trapeziums:

- Discuss the properties of trapeziums.
- Introduce formulas for calculating the perimeter and area of trapeziums.
- Provide examples and step-by-step calculations for trapeziums.

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Final answer:

Perimeter is the external boundary of a shape, while area represents the space inside the shape, crucial in geometry for measuring and planning. Formulas for calculating perimeter and area vary for different types of triangles.


Explanation:

Perimeter is the total distance around the outside of a plane shape, while area is the amount of space inside the shape. Perimeter is like the fence around a yard, and area is like the grass inside the fence.

In geometry, perimeter is important for measuring the boundary of shapes, while area is crucial for understanding how much space a shape occupies. For example, when planning to paint a wall, knowing the area helps calculate the amount of paint needed.

For triangles, the perimeter is the sum of the lengths of all three sides, and the area can be calculated using the formula 'Area = 0.5 x base x height.' Different types of triangles like equilateral, isosceles, and scalene have specific formulas to find their perimeter and area.


Learn more about Perimeter, area, and formulas for triangles here:

https://brainly.com/question/40267400


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