Please help. the question is in the picture.

Mathematics

2 answers:

Harlamova29_29 [7]3 years ago

8 0

We have measures of all tree sides of the both triangles,

so we can use SSS to check if the triangles are similar.

|ED|/|AB| =5/10=1/2

|DC|/|BC| = 4/8 = 1/2

|EC|/|AC| = 6/12 = 1/2

We see that all tree pairs are in proportion, so these triangles ΔABC and ΔEDC are similar.

We have enough information to prove that ΔABC similar to ΔEDC.

Ugo [173]3 years ago

5 0

We see E is a midpoint so AC:EC=2:1

So our scale factor for similarity must be 2. Let's check the other two sides

AB:ED = 10:5 = 2:1 good

BC:DC = 8:4 = 2:1 good

Each side of ABC is twice its respective side of EDC, so we've shown they're similar.

Answer: Yes

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Read 2 more answers

Question Help Scores of an IQ test have a bell-shaped distribution with a mean of 100100 and a standard deviation of 1010. Use

3241004551 [841]

Answer:

a) 95% percentage of people has an IQ score between 80 and 120.

b) 68% percentage of people has an IQ score between 90 and 110.

c) 2.5% percentage of people has an IQ score greater than 120.

Step-by-step explanation:

The empirical formula states that:

The empirical rule is known as the three-sigma rule or 68-95-99.7 rule.
It is a rule which states that for a normal distribution, almost all data falls within three standard deviations of the mean.
68% of data falls within the first standard deviation that is $\mu \pm \sigma$