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squadfam2024
09.04.2021 •
Mathematics
Find the lateral area of this cone.
Leave your answer in terms of .
15 cm
78 cm
LA = [ ? ]7 cm2
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Ответ:
7.07
Step-by-step explanation:
Lengtha square has equal length on each side
hence is the perimeter is 20 it means that :
each side is 20/4 = 5
we can make a diagonal line which create 3 right angled triangles
2 sides of the triangle are 5 , this is the base and the height
to find the length we can make use of the Pythagoras theorem
c^2 = a^2 + b^2
c is the hypotenuse ( the diagonal;)
a and b are the opposite and adjacent
hence :
c^2 = 5 ^2 + 5^2
c^2 = 50
c =![\sqrt{50}](/tpl/images/0552/6390/6c634.png)
c = 7.071
to 3sf
diagonal length = 7.07