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Find the area of an equilateral triangle that has side lengths of 8 cm . Round your answer to the nearest tenth. The area of the equilateral triangle is

Ask by Marsh Schneider. in the United States
Feb 03,2025

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Answer

The area of the equilateral triangle is 27.7 cm².

Solution

To find the area of an equilateral triangle with side length \( a = 8 \) cm, you can use the formula: \[ \text{Area} = \frac{\sqrt{3}}{4} \times a^2 \] Plugging in the given side length: \[ \text{Area} = \frac{\sqrt{3}}{4} \times 8^2 = \frac{\sqrt{3}}{4} \times 64 = 16\sqrt{3} \] Using the approximate value of \( \sqrt{3} \approx 1.732 \): \[ \text{Area} \approx 16 \times 1.732 = 27.712 \text{ cm}^2 \] Rounded to the nearest tenth: \[ \text{Area} \approx 27.7 \text{ cm}^2 \] **The area of the equilateral triangle is 27.7 cm².**

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Bonus Knowledge

To find the area of an equilateral triangle, you can use the formula: Area = (sqrt(3)/4) * side^2. So for a triangle with a side length of 8 cm, the area would be (sqrt(3)/4) * (8^2) = (sqrt(3)/4) * 64 = 16sqrt(3). Rounding this to the nearest tenth gives you approximately 27.7 cm². Another fun fact: The concept of equilateral triangles has been around for millennia! Ancient mathematicians discovered properties of these triangles that laid the groundwork for much of modern geometry. They appreciated symmetry and balance, which is why you'll often see equilateral triangles in art, architecture, and even nature! If you're ever faced with an equilateral triangle in real life, like when slicing a slice of pizza or pie that looks completely equal, just remember this area formula! It can also come in handy in various architectural designs where space needs to be calculated efficiently. So whether you're designing a kite or drafting a blueprint, keep that triangle in mind!

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