C-16-Q021: The area of an equilateral triangular region of side $a$ is — | প্রশ্ন করি

হোম›নবম-দশম শ্রেণি›English Version›Mathematics›Chapter 16: Mensuration›C-16-Q021

C-16-Q021mediumsingle_mcq

The area of an equilateral triangular region of side $a$ is —

a $\dfrac{\sqrt{3}}{2}a^{2}$
b $\dfrac{\sqrt{3}}{4}a^{2}$
c $\dfrac{1}{2}a^{2}$
d $a^{2}$

ব্যাখ্যা

For an equilateral triangle, applying $\frac{1}{2}a^2\sin 60°$ gives $\frac{1}{2} a^{2} \cdot \frac{\sqrt{3}}{2} = \frac{\sqrt{3}}{4}$ . This is the standard equilateral-triangle area formula.

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এই অধ্যায়ের আরও প্রশ্ন

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C-16-Q030

a^{2}

\frac{1}{2}a^2 \cdot \frac{\sqrt{3}}{2} = \frac{\sqrt{3}}{4}a^2

\frac{1}{2} a^{2} \cdot \frac{3}{2} = \frac{3}{4} a^{2}

The area of an isosceles triangle with equal sides and base is —

C-16-Q031An isosceles triangle has base cm and area sq cm. The length of each equal side is —

Chapter 16: Mensuration — সব প্রশ্ন দেখুন (210টি) →

The area of an equilateral triangular region of side aaa is —

ব্যাখ্যা

এই অধ্যায়ের আরও প্রশ্ন

The area of an equilateral triangular region of side $a$ is —