Find the area of an equilateral triangle of side 6 cm-A- None of theseB- 18 -3 cm 2- 9 -3 cm 2D- 12 -3 cm 2

The correct option is C 9√(3) cm^2 Area of equilateral triangle = √(3)/4 side^2 = √(3)/4 6^2 = 9√(3) cm^2 ...

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Standard VIII

Mathematics

Identifying Shapes and Areas of Different Regular Figures

Find the area...

Question

Find the area of an equilateral triangle of side 6 cm.

18 \sqrt{3}

c m^{2}

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9 \sqrt{3}

c m^{2}

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12 \sqrt{3}

c m^{2}

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None of these

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Solution

The correct option is B $9 \sqrt{3}$ $c m^{2}$

Area of equilateral triangle = $\frac{\sqrt{3}}{4}$ $s i d e^{2}$
= $\frac{\sqrt{3}}{4}$ $6^{2}$
= $9 \sqrt{3} c m^{2}$

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Find the area of an equilateral triangle of side 6 cm.

The correct option is B 9√3 cm2 Area of equilateral triangle = √34 side2 = √34 62 = 9√3cm2

The correct option is B $9 \sqrt{3}$ $c m^{2}$

Area of equilateral triangle = $\frac{\sqrt{3}}{4}$ $s i d e^{2}$
= $\frac{\sqrt{3}}{4}$ $6^{2}$
= $9 \sqrt{3} c m^{2}$