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Preeti Dabral 4 years, 2 months ago
Similar as(side=14cm):
As per the given figure in question,
∠ABC = ∠BAC = ∠ACB = 60 ….[In an equilateral triangle all angles are of 60° each]
Now θ = 60°, r = {tex}{14 \over 2}{/tex} = 7 cm
Area of shaded region = ar(ΔABC) – 3{tex}\times{/tex} (area of minor sector)
{tex}{ = \frac{{\sqrt 3 }}{4}{{\left( {Side} \right)}^2}\; - \;3 \times \frac{\emptyset }{{360}}\;\pi {{\text{r}}^2}}{/tex}
{tex}{ = \;\;\frac{{1.73}}{4}\; \times 14 \times 14\; - \;3 \times \frac{{60}}{{360}}\; \times \;\frac{{22}}{7} \times 7 \times 7}{/tex}
{tex}{ = \;1.73\; \times 7 \times 7\; - \;3\; \times \frac{1}{6} \times 22 \times 7}{/tex}
{tex}{ = \;84.77\; - \;\frac{1}{2} \times 22 \times 7}{/tex}
{tex}{ = \;84.77\; - \;\;11 \times 7}{/tex}
= 84.77 - 77
= 7.77 cm2
Hence, the area of the shaded region = 7.77 cm2
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- In the chapter, Albert Einstein's history is discussed with respect to his early education and his living conditions.
- Einstein lived in a poor area, slum like area. His landlady was seen beating her children and beaten by her own husband. Einstein did not live in a pleasant environment.
- At first Einstein's teacher Mr.Braun inquired whether he ever learned and wanted to learn anything or not. For example, "when Mr.Braun asked Einstein about Napoleon's defeat, Einstein answered that he didn't know. Furthermore he defended himself by stating that he didn't see a point in learning about yearly dates".
- Einstein was seen explaining the theory of education at an early age. That there is no point in learning dates, because they do not educate you about anything.
- Einstein was yelled at for his ideology and ordered to be taken home.
- Einsteins father did not want Einstein to leave school until the fulfillment of his education.
- Einstein had issues in learning topics by heart.
- He liked geology as a subject.
- He liked to play the violin.
- He was expelled from school and he decided to spend the rest of his years in Milan.
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