Mikel is determining if the two triangles below could be similar based on their side lengths.
2 answers:
Answer: The following statements accurately describe the triangles.
(1) The triangles could not be similar
(2) The ratios of the side lengths are not consistent
Step-by-step explanation: Please refer to the picture attached for more details.
For two triangles to be described as similar or congruent, the sides or the angles must be proven to be similar by means of a common ratio. That is, the sides might have different measurements but the ratio by which one side increases or reduces to the match the measurement of the other one must apply to all sides of the triangle consistently.
Considering the triangles in the question, triangle RST has side RS measuring 3 units, while the corresponding side in WXU which is side WX measures 18 units. That means the ratio is 3 : 18 or 1 : 6. This ratio must apply to the other sides of the triangle otherwise they cannot be described as similar. Hence, in triangle RST, if side ST is 6 units, using the ratio of 1 : 6 (or 1/6), then side XU in the other triangle should measure;
1/6 = 6/x
x = 6 *6
x = 36
Since the corresponding side in triangle WXU which is XU measures 7.5 units (and not 36 units), then the ratios of the side lengths are not consistent, and for this reason the triangles could not be similar.
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Answer:
The cost is $9.70 per kilogram.
Step-by-step explanation:
This can be solved by a rule of three.
In a rule of three problem, the first step is identifying the measures and how they are related, if their relationship is direct of inverse.
When the relationship between the measures is direct, as the value of one measure increases, the value of the other measure is going to increase too. In this case, the rule of three is a cross multiplication.
When the relationship between the measures is inverse, as the value of one measure increases, the value of the other measure will decrease. In this case, the rule of three is a line multiplication.
In this problem, the measures are the weight of the cheese and the price. As the weight increases, so does the price. It means that this is a direct rule of three.
Solution:
The problem states that cheese costs $4.40 per pound. Each kg has 2.2 pounds. How many kg are there in 1 pound. So:
1 pound - xkg
2.2 pound - 1 kg
kg
Since cheese costs $4.40 per pound, and each pound has 0.45kg, cheese costs $4.40 per 0.45kg. How much does is cost for 1kg?
$4.40 - 0.45kg
$x - 1kg
The cost is $9.70 per kilogram.