Find the area of an equilateral triangle of side 10 cm-A- 18 -3 cm 2B- 25 -3 cm 2C- 12 -3 cm 2D- 27 -3 cm 2

The correct option is B 25√(3) cm^2 Area of equilateral triangle = √(3)/4 side^2 = √(3)/4 10^2 =25√(3) cm^2 ...

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Byju's Answer

Standard VIII

Mathematics

Identifying Shapes and Areas of Different Regular Figures

Find the area...

Question

Find the area of an equilateral triangle of side 10 cm.

$18 \sqrt{3} c m^{2}$

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$25 \sqrt{3} c m^{2}$

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$12 \sqrt{3} c m^{2}$

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$27 \sqrt{3} c m^{2}$

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Solution

The correct option is B
$25 \sqrt{3} c m^{2}$

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

$= \frac{\sqrt{3}}{4} 10^{2}$

$= 25 \sqrt{3} c m^{2}$

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Find the area of an equilateral triangle of side 10 cm.

The correct option is B 25√3 cm2 Area of equilateral triangle = √34 side2 =√34102 =25√3 cm2

The correct option is B
$25 \sqrt{3} c m^{2}$

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

$= \frac{\sqrt{3}}{4} 10^{2}$

$= 25 \sqrt{3} c m^{2}$