2. 1. The two circular faces of the cylinder are called low faces; The surrounding area is called the side; The distance between two bottom surfaces is called height.

2. The surface area of the cylinder = the side area of the cylinder+the areas of the two bottom surfaces.

3. The side area of the cylinder = the height of the bottom perimeter.

4. Volume of cylinder = area of bottom multiplied by height (V cylinder =Sh).

6. Cone volume = 1/3 bottom area times height. (V cone = 1/3V cylinder = 1/3Sh)

3. 1. Two formulas with equal ratios are called proportions.

2. The unknown term in the ratio is called the solution ratio.

3. In proportion, the product of two external terms is equal to the product of two internal terms, which is called the basic property of proportion.

4. Proportional relationship: y/x=k (certain).

5. Inverse relationship: xy=k (certain)

6. The ratio of the distance on the map to the actual distance is called scale.

Distance on map/actual distance = scale.