Q-8 Write the following formulas.
1. Perimeter of a rectangle = _________________.
2. Perimeter of a square = _________________.
3. Perimeter of regular polygon = _________________.
4. Area of rectangle = _________________. 5. Area of square = _________________. 6. Area of parallelogram = _________________.
7. Area of triangle = _________________. 8. Area of circle = _________________. 9. Circumference of circle = _________________.
10.Perimeter of parallelogram = _________________.
Answers
Answer:
Step-by-step explanation:
1. Perimeter of a rectangle = P = length + breadth + length + breadth.
2. Perimeter of a square = a + a + a + a = 4 a units. Hence, the formula of the perimeter of a square = 4 × (length of any one side).
3. Perimeter of a regular polygon = Perimeter = (number of sides) × (length of one side).
4. Area of a rectangle= The formula to find the area of a rectangle is A = l × w.
5. Area of square =The area of a square is calculated with the help of the formula: Area = s × s, where, 's' is one side of the square. Since the area of a square is a two-dimensional quantity, it is always expressed in square units.
6. Area of a parallelogram = The formula to calculate the area of a parallelogram is given as Area of parallelogram = base × height square units.
7. Area of a triangle = The basic formula to find the area of a triangle is, area of triangle = 1/2 (b × h); where 'b' is the base and 'h' is the height of the triangle.
8. Area of a circle = The area of a circle is pi times the radius squared (A = π r²).
9. Circumference of a circle = 2πr
10. Perimeter of a parallelogram= The formula of the perimeter of parallelogram = 2(Length+Breadth).
- P=2(l+w)
- 4×sides
- (number of side)×(length of one side)
- A=(w×l)
- A= a²
- A=b×h
- A=hb/2
- A= π r²
- C=2π r
- P=2(a+b)