Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground. For example, a 1:100000 scale map is considered a larger scale than a 1:250000 scale map.

Each 1 km is equivalent to 4 cm on the map, so the distance on the map will be 4cm × 7 = 28 cm.

To get this answer, you start off with the ratio 4 cm: 50 km which is given to us. It means that 4 cm corresponds to 50 km. 1 cm on paper represents 12.5 km in real life.

Answer Expert Verified Here, 3.2 centimeters on the map is equivalent to 4 kilometers. We can use unitary method to find, how many kilometer/kilometers each centimeter corresponds to. Using the unitary method: Therefore, the scale of map represents 1.25 kilometers for each centimeter.

We are asked to find the scale factor of a map, when 3 cm on the map correspond to 120 km in the actual distance. To find scale of the map, we will divide actual distance by distance on map as: Since 1 cm on map corresponds to 40 km in the actual distance, therefore, the scale is 1 cm : 40 km.

to take the two coordinates and calculate the distance between them in calculator. Then measure the actual distance between the points with with tape or Total station. Then divide calculated distance by measured distance. For road works scale factor can be included in the job settings.

Scale factor is the ratio of corresponding side lengths. (new image to old image) of similar figures. Example: Figure A and figure B differ by a scale factor.

The scale factor is the ratio of the length of a side of one figure to the length of the corresponding side of the other figure. Example: Here, XYUV=123=4 . So, the scale factor is 4 .

Enlarge the triangle PQR by a scale factor of 3 about the centre of enlargement O.

1. First draw ray lines from O to each corner of the triangle and extend them.
2. Next measure the distance from O to each corner of PQR. Multiply this distance by 3 and plot the points P’ Q’ and R’.
3. Finally join up the points P’ Q’ R’.

Step-by-Step:

1. Plot the centre of enlargement. In our example, the Cartesian coordinates of the centre of enlargement is (1, 1).
2. Draw a line from the centre of enlargement to point A.
3. Measure the length of this line.
4. Measure the distance found in Step 4 along the line drawn in Step 2.

2) If the scale factor is 2, draw a line from the centre of enlargement, through each vertex, which is twice as long as the length you measured. If the scale factor is 3, draw lines which are three times as long. If the scale factor is 1/2, draw lines which are 1/2 as long, etc. The centre of enlargement is marked.

What happens when scale factor k is a negative value? If the value of scale factor k is negative, the dilation takes place in the opposite direction from the center of dilation on the same straight line containing the center and the pre-image point.

(It expands) • If the scale factor is between 0 and 1, the image is a reduction.