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Mathematics

1 answer:

Firlakuza [10]3 years ago

7 0

Though these segments aren't marked congruent in the diagram, the two lines inside the circle making up the bases of the triangles are congruent as all radii are congruent. So the triangles are congruent by SAS.

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Please help me i don’t get it

vfiekz [6]

Answer: 615.44 cm²

Step-by-step explanation: When solving this problem the formula that you need to know is that area = π r².

The 14 cm that they are giving you is the radius of the circle, and π equals 3.14. So, in order to solve this the formula is:

Area = 3.14 x 14²

Area = 3.14 x 196

Area = 615.44 cm²

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GuDViN [60]

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The following histogram presents the amounts of silver (in parts per million) found in a sample of rocks. One rectangle from the

gladu [14]

Answer:

The height of the missing rectangle is 0.15

Explanation:

The image attached has the mentioned histogram.

Such histogram presents the relative frequencies for the clases [0,1], [1,2],[2,3], [4,5], and [5,6] Silver in ppm.

Only the rectangle for the class [3,4] is missing.

The height of each rectangle is the relative frequency of the corresponding class.

The relative frequencies must add 1, because each relative frequency is calculated dividing the absolute class frequency by the total number in the sample; hence, the sum of all the relative frequencies is equal to the total absolute class frequencies divided by the same number, yielding 1.

In consequence, you can sum all the known relative frequencies and subtract from 1 to get the missing relative frequency, which is the height of the missing rectangle.

1. Sum of the known relative frequencies: