Answer:
25 students
Step-by-step explanation:
.8x = 20
x = 25 students
The length of the unknown sides of the triangles are as follows:
CD = 10√2
AC = 10√2
BC = 10
AB = 10
<h3>Triangle ACD</h3>
ΔACD is a right angle triangle. Therefore, Pythagoras theorem can be used to find the sides of the triangle.
where
c = hypotenuse side = AD = 20
a and b are the other 2 legs
lets use trigonometric ratio to find CD,
cos 45 = adjacent / hypotenuse
cos 45 = CD / 20
CD = 1 / √2 × 20
CD = 20 / √2 = 20√2 / 2 = 10√2
20² - (10√2)² = AC²
400 - 100(2) = AC²
AC² = 200
AC = √200 = 10√2
<h3>
Triangle ABC</h3>
ΔABC is a right angle triangle too. Therefore,
Using trigonometric ratio,
cos 45 = BC / 10√2
BC = 10√2 × cos 45
BC = 10√2 × 1 / √2
BC = 10√2 / √2 = 10
(10√2)² - 10² = AB²
200 - 100 = AB²
AB² = 100
AB = 10
learn more on triangles here: brainly.com/question/24304623?referrer=searchResults
The statistics are made to be misleading in such a way that the scale is altered on the graph. So, option C is correct.
<h3>What are statistics?</h3>
Statistics is the study of the discipline that concerns the organization, collection, analysis, and presentation of data.
A hasty generalization is fallacy in which a conclusion is reached before sufficient or unbiased evidence is gathered.
The statistics are made to be misleading in such a way that the scale is altered on the graph. So, option C is correct.
Learn more about statistics ;
brainly.com/question/4352866
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1. b 2. a 3. a
100% correct edge 2021
Step-by-step explanation:
