Define proportion.
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tỷ số và tỷ lệ 2in1
- Explain the relationship between the ratio of sides and the ratio of areas of similar figures.
- Describe how to distribute a sum proportionally. The angles in a triangle are such that the ratio of the first to the second is 2 3, and the ratio of the second to the third is 4 5. Find the measure of each angle.
- Explain how the speed of the current affects the upstream and downstream speeds. The ratio of the speeds of a car and a bus is 2 3. If the car takes 5 hours to travel a certain distance, how long will the bus take to travel the same distance?
- Set up a proportion to solve this problem Apples Oranges = 3 2, Apples = 15, find Oranges.
- Use the concept of weighted averages or set up equations based on the amounts of acid.
- Use the inverse relationship between the number of workers (or rate of work) and the time taken.
- Explain how the change in speed affects the time taken. Two numbers are such that their ratio is 3 5. If 10 is added to each number, the ratio becomes 5 7. Find the original numbers.
- Explain the concept of map scales as ratios.
- Assume the total volume is 100 units and find the volumes of water and other components.
- Explain the meaning of the ratio in this context. A metal alloy contains copper, zinc, and nickel in the ratio 5 3 2. If the weight of the alloy is 500 grams, find the weight of each metal.
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