Flash Cards
1/20
Define perimeter.
The perimeter of a closed plane figure is the total distance along its boundary when you go around it once.
How well did you know this?
2/20
How to calculate the perimeter of a polygon?
The perimeter of a polygon is the sum of the lengths of all its sides.
3/20
What is the formula for the perimeter of a rectangle?
Perimeter of a rectangle = 2 × (length + breadth).
4/20
Calculate the perimeter of a rectangle with length 12 cm and breadth 8 cm.
Perimeter = 2 × (12 cm + 8 cm) = 40 cm.
5/20
What is the formula for the perimeter of a square?
Perimeter of a square = 4 × length of one side.
6/20
Find the perimeter of a square with side length 1 m.
Perimeter = 4 × 1 m = 4 m.
7/20
How to calculate the perimeter of a triangle?
Perimeter of a triangle = sum of the lengths of its three sides.
8/20
Calculate the perimeter of a triangle with sides 4 cm, 5 cm, and 7 cm.
Perimeter = 4 cm + 5 cm + 7 cm = 16 cm.
9/20
How to find the length of lace needed for a tablecloth?
Length of lace required = perimeter of the tablecloth (length + breadth = 10 m for 3 m x 2 m).
10/20
What is a common mistake when calculating perimeter?
Adding the lengths of some sides only, while ignoring others. Always sum all sides.
11/20
How does the perimeter of a rectangle compare to a square?
Rectangle's perimeter depends on differing lengths and breadths; square's perimeter is always 4 times the side length.
12/20
How to calculate the distance covered in multiple rounds?
Distance = number of rounds × perimeter. E.g., 3 rounds of a park with 300 m perimeter = 900 m.
13/20
What is the unit of perimeter?
The unit of perimeter is the same as the unit of length (e.g., cm, m).
14/20
How to find a missing length if perimeter is known?
Use the perimeter formula to solve for the unknown length.
15/20
How to calculate fencing for a square park?
Use the perimeter formula: 4 × length of one side.
16/20
Why is perimeter important in real-life problems?
It is used in applications like fencing, framing, and decoration.
17/20
How to calculate the perimeter of an irregular shape?
Measure the length of each side and sum them for the total perimeter.
18/20
Effect of transforming a rectangle into a square on perimeter.
The total perimeter remains the same if the wire length used is unchanged.
19/20
What is the perimeter of a rectangle with length 5 m and breadth 3 m?
Perimeter = 2 × (5 m + 3 m) = 16 m.
20/20
Why draw shapes when finding perimeter?
Drawing helps visualize and accurately measure all sides.
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