# How do you find the area in geography grade 12?

## How do you find the area in geography grade 12?

in km²/m².

1. Example of the calculation of area A on the topographic map in km²
2. Formula: Area = length (L) × breadth (B)

### How do you calculate true bearing?

Calculate True Bearing From Magnetic Bearing

1. If Declination is East. True Bearing(T.B) = [Magnetic Bearing(M.B) + Declination]
2. If Declination is West. True Bearing = [Magnetic Bearing – Declination]

How do you calculate gradient in geography?

Gradient is slope of the land and calculated by dividing the rise (vertical difference) by the run (horizontal difference). two points is 14cm, and the scale of the map is 1:100,000. two points is 15cm, and the scale of the map is 1:100,000. two points is 10cm, and the scale of the map is 1:100,000.

How do you find an area of a shape?

Area is calculated by multiplying the length of a shape by its width. In this case, we could work out the area of this rectangle even if it wasn’t on squared paper, just by working out 5cm x 5cm = 25cm² (the shape is not drawn to scale).

## How do you find the height of a spot?

Spot Height = 11.500 – ((11.500 – 11.000) x (30 ÷ 60)

### How do you calculate distance in geography?

A quick way to measure distance is to count each square you cross on the map. On your Ordnance survey map each grid square measures one kilometre from side to side and from top to bottom. If you go diagonally across a square, the distance will be a bit longer – about 1.5 km.

How do you read a bearing and distance?

These are usually drawn and then each line is annotated with bearing and distance. An example of bearing and distance might be N 66° 0′ 0″ E 1245.01′. This can be read more descriptively as North 66 degrees 0 minutes and 0 seconds for a distance of 1245.01 feet.

How do you read a bearing?

A true bearing expresses the direction in terms of the angle made with North, the angle always being drawn clockwise. For example: In the diagram at right the angle drawn clockwise from North is 35°. Thus its true bearing is 35°T. (The T signifies a true bearing.)

## How do you calculate gradient on a calculator?

1. rise = y2 – y1.
2. run = x2 – x1.
3. Gradient (m) = rise / run.

### How do you calculate a gradient?

To calculate the gradient of a straight line we choose two points on the line itself. The difference in height (y co-ordinates) ÷ The difference in width (x co-ordinates). If the answer is a positive value then the line is uphill in direction. If the answer is a negative value then the line is downhill in direction.

How is a line scale calculated in mapwork?

This is a horizontal line drawn on the map, which is divided into a number of equal parts. A line scale is accurate and no calculations are used. A line scale is divided into two parts: (a) To the right of zero – each division of the scale represents a distance of 1km. (b) To the left of zero – The distance represents 1km (1 000m).

How to work with scales in gr 12 Maths?

In this live Gr 12 Maths Literacy show we take a look at Working with Map Scales. In this lesson we introduce and do questions relating to: Number scales, bar scales, determining scales, calculating lengths and distances when a map or plan scale is known as well as calculating scales when distances are known.

## What are the three ways of expressing a map scale?

There are three ways of expressing map scales: 1.1 Representative Fraction / Ratio:This is a numerical way of showing how greatly ground distances have been reduced. It is also known as a numerical scale. This scale is shown in two ways: e.g.

### How do you draw a line on a map?

Draw a straight line from your starting point to the end point. Place the protractor on the map, with 0° pointing to the top of the map. Use the line connecting the two points to read the degrees from the protractor. Remember to measure in a clockwise direction from the top.