Six-sided 44151

The parasol has the shape of the shell of a regular six-sided pyramid, whose base edge is a=6dm and height v=25cm. How much fabric is needed to make a parasol if we count 10% for joints and waste?

Correct answer:

S =  114.1724 dm2

Step-by-step explanation:

a=6 dm h=25 cm dm=25:10  dm=2.5 dm n=6  h12 +(a/2)2 = a2  h1=a2a2/4=6262/4=3 3 dm5.1962 dm  h2=h2+h12=2.52+5.196225.7663 dm S1=n 2a h2=6 26 5.7663=9 133 dm2103.7931 dm2 q=100%+10%=1+10010=1.1  S=q S1=1.1 103.7931=114.1724 dm2

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