7th December 2019

skillsyouneed

12

How do you get area?

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The simplest (and most commonly used) area calculations are for squares and rectangles. To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.

Considering this, what is the formula of finding the area of a rectangle?

Area is measured in square units such as square inches, square feet or square meters. To find the area of a rectangle, multiply the length by the width. The formula is: A = L * W where A is the area, L is the length, W is the width, and * means multiply.

How do we calculate the area of a rectangle?

Method 2 Find the Area of a Rectangle

Find the length of the rectangle. In most cases, you will be given the length, but if not, you can find it using a ruler.
Find the width of the rectangle.
Write the length and width next to each other.
Multiply the length times the width.
State your answer in square units.

1

How do you calculate the surface area of something?

Part 1 Finding the Surface Area

Label the length, width, and height of your rectangular prism.
Look at the six faces of the prism.
Find the area of the bottom face.
Find the area of the top face.
Find the area of the front and back faces.
Find the area of the left and right faces.
Add the six areas together.

2

How do you work out square meters?

Method 1 Calculating an Area in Square Meters

Choose a meter stick or metric tape measure.
Measure the length of the area you're measuring.
If you can't measure the entire length at once, do it in stages.
Measure the width.
Convert from centimeters to meters.
Multiply the length and width together.

3

How do you calculate the area of a circle?

To find the area of a circle with the radius, square the radius, or multiply it by itself. Then, multiply the squared radius by pi, or 3.14, to get the area. To find the area with the diameter, simply divide the diameter by 2, plug it into the radius formula, and solve as before.

4

How do you find the area of a half circle?

In the case of a circle, the formula for area, A, is A = pi * r^2, where r is the circle's radius. Since we know that a semicircle is half of a circle, we can simply divide that equation by two to calculate the area of a semicircle. So, the formula for the area of a semicircle is A = pi * r^2/2.

5

How do you figure out the height of a triangle?

Plug your values into the equation A=1/2bh and do the math. First multiply the base (b) by 1/2, then divide the area (A) by the product. The resulting value will be the height of your triangle!

6

How do you find the angles of a triangle?

Example

Step 1 The two sides we know are Opposite (300) and Adjacent (400).
Step 2 SOHCAHTOA tells us we must use Tangent.
Step 3 Calculate Opposite/Adjacent = 300/400 = 0.75.
Step 4 Find the angle from your calculator using tan^-¹

7

How do you find the area of a composite figure?

A composite figure is made up of several simple geometric figures such as triangles, rectangles, squares, circles, and semicircles. To find the area of a composite figure, separate the figure into simpler shapes whose area can be found. Then add the areas together.

8

What is the formula for area?

Area is measured in square units such as square inches, square feet or square meters. To find the area of a rectangle, multiply the length by the width. The formula is: A = L * W where A is the area, L is the length, W is the width, and * means multiply.

9

How do we calculate area?

The simplest (and most commonly used) area calculations are for squares and rectangles. To find the area of a rectangle multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area.

10

What is the area in math?

Area is the quantity that expresses the extent of a two-dimensional figure or shape, or planar lamina, in the plane. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number.

11

How do I find the volume?

Make sure that measurements are in the same units. Multiply the length by the width by the height. Check that the units are correct, e.g. m3 Volume of a cuboid = length x width x height. Volume measures the total amount of space taken up by a three-dimensional object such as a storeroom or a box.

12

How do you find the surface area of a rectangle?

How to find the surface area of Rectangular Prisms:

Find the area of two sides (Length*Height)*2 sides.
Find the area of adjacent sides (Width*Height)*2 sides.
Find the area of ends (Length*Width)*2 ends.
Add the three areas together to find the surface area.
Example: The surface area of a rectangular prism 5 cm long, 3 cm.

13

How can you find the circumference of a circle?

How to find the circumference of a circle:

The circumference of a circle can be found by multiplying pi ( π = 3.14 ) by the diameter of the circle.
If a circle has a diameter of 4, its circumference is 3.14*4=12.56.
If you know the radius, the diameter is twice as large.

14

What are perimeter and area?

Calculating the area and the perimeter. The perimeter is the length of the outline of a shape. To find the perimeter of a rectangle or square you have to add the lengths of all the four sides. x is in this case the length of the rectangle while y is the width of the rectangle.

15

How do you find the length?

To find the width, multiply the length that you have been given by 2, and subtract the result from the perimeter. You now have the total length for the remaining 2 sides. This number divided by 2 is the width.

16

How do you get the volume of a rectangular prism?

Multiply the length, the width, and the height. You can multiply them in any order to get the same different result. The formula for finding the volume of a rectangular prism is the following: Volume = Length * Height * Width, or V = L * H * W.

17

How do you figure out the perimeter of a triangle?

Method 1 Finding the Perimeter When Three Side Lengths are Known

Remember the formula for finding the perimeter of a triangle.
Look at your triangle and determine the lengths of the three sides.
Add the three side lengths together to find the perimeter.
Remember to include the units in your final answer.

18

How do I find the perimeter of a rectangle?

To find the perimeter of a rectangle, add the lengths of the rectangle's four sides. If you have only the width and the height, then you can easily find all four sides (two sides are each equal to the height and the other two sides are equal to the width). Multiply both the height and width by two and add the results.

19

What is the formula for the area of a?

Area of a square = side times side. Since each side of a square is the same, it can simply be the length of one side squared. If a square has one side of 4 inches, the area would be 4 inches times 4 inches, or 16 square inches. (Square inches can also be written in².)

20

What is the formula of perimeter?

A Rectangle's Perimeter. The perimeter of a rectangle is equal to the sum of all the sides. However, since a rectangle's opposite sides are congruent, we only need to know the length and width. We can write this in an equation this way: P = l + w + l + w.

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