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Q: What is the area rounded to the nearest tenth of a square inch of an equilateral triangle that has a perimeter of 24 inches?

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Perimeter of equilateral triangle: 24 units Area of equilateral triangle: 27.713 square units rounded to three decimal places

21.2 sq inches.

14.00

It is: 0.5*4*4*sin(60 degrees) = 7 square cm rounded to nearest integer

1.00

It works out as 22.335 feet rounded to three decimal places

Each side is: 16.65/3 = 5.55 cm Area is: 0.5*5.55*5.55*sin(60 degrees) = 13.34 square cm rounded

1.00

Using the sine rule in trigonometry the perimeter of the triangle works out as 382cm rounded to the nearest integer

Area = 0.5*7.52*sin(60 degrees) = 24.357 square cm rounded to 3 dp.

13.00

It is: 0.5*7.5 square*(sin 60 degrees) = 24.357 square cm rounded up to 3 d.p.

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