What are the two formulas for surface area?
Surface area formula
- Cube: Surface area = 6 × a2
- Right circular cylinder: Surface area = 2 × pi × r2 + 2 × pi × r × h.
- Rectangular prism: Surface area = 2 × l × w + 2 × l × h + 2 × w × h.
- Sphere: Surface area = 4 × pi × r2
- Right circular cone: Surface area = pi × r2 + pi × r ×( √(h2 + r2))
- Right square pyramid:
What are the formulas for surface area?
Variables:
| Surface Area Formula | Surface Area Meaning |
|---|---|
| SA=4πr2 | Find the area of the great circle and multiply it by 4. |
| SA=B+πrS | Find the area of the base and add the product of the radius times the slant height times PI. |
What is the formula of all shapes?
Formula for geometrical figures
| Shape | Formula | |
|---|---|---|
| ◻ | Square | 4 × side |
| ⎕ | Rectangle | 2 × (length + width) |
| ▱ | Parallelogram | 2 × (side1 + side2) |
| △ | Triangle | side1 + side2 + side3 |
What is the base of a 2D shape?
The surface a solid object stands on, or the bottom line of a shape such as a triangle or rectangle. But the top is also called a base when it is parallel to the bottom!
What is the perimeter of a 2D shape?
The perimeter is the distance all the way around the outside of a 2D shape. To work out the perimeter, add up the lengths of all the sides.
How do you calculate shapes?
Here are the most important and useful area formulas for sixteen geometric shapes:
- Square area formula: A = a²
- Rectangle area formula: A = a * b.
- Triangle area formulas:
- Circle area formula: A = πr²
- Circle sector area formula: A = r² * angle / 2.
- Ellipse area formula: A = a * b * π
What is the formula for all shapes?
Mathematical Handbook of Formulas and Tables. Schaum’s Outline series in Mathematics. McGraw-Hill Book Co., 1968….Formula for geometrical figures.
| Shape | Formula | |
|---|---|---|
| ◯ | Circle | 2 × pi × radius |
| ◻ | Square | 4 × side |
| ⎕ | Rectangle | 2 × (length + width) |
| ▱ | Parallelogram | 2 × (side1 + side2) |
What is the formula of 2 into L B?
Solution: As we know, the total surface area of a cuboid, S = 2 (lb + bh + lh) and the lateral surface area of a cuboid is 2h(l + b). Therefore, the total surface area of cuboid and lateral surface area of a cuboid is 108 in2 and 60 in2 respectively.