


How are angles related in similar figures? What is the relationship between ratio, rate, and unit rate?
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tỷ số và tỷ lệ 2in1
- Explain the relationship between the ratio of areas and the ratio of sides of similar polygons.
- Explain the relationship between speed and distance when time is constant. Two trains start from the same point at the same time and travel in opposite directions. The ratio of their speeds is 5 7. After 3 hours, they are 360 km apart. Find the speed of each train.
- How do you find the constant of proportionality? If a varies directly as b, and a = 24 when b = 8, find the constant of proportionality.
- Explain how to find percentages from success/failure ratios. A sale offers a 30% discount. What is the ratio of the sale price to the original price?
- 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.
- Give an example of an inverse proportion. If y is inversely proportional to x, and y = 6 when x = 3, find y when x = 2.
- Describe how to use a common multiple to solve ratio problems. A recipe calls for flour and sugar in the ratio 4 1. If you use 2 cups of sugar, how much flour do you need?
- Divide the total volume according to the ratio.
- How are they similar? How are they different?
- Use the formula time = distance/speed.
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