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Q: Area of an equilateral triangle with a 9 inch perimeter?

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Area of equilateral triangle: 0.5*8*8*sin(60 degrees) = 27.7 square inches rounded

12 inches

If square has a 28-inch perimeter its area is: 49 square inches.

That's oddly worded. You can't find the area of a perimeter. Either way, we need to know how many sides there are. A square with 6-inch sideshas a perimeter of 24 inches and an area of 36 square inches.

Yes it is possible. Consider these two shapes with the same area: a 2-inch square and a 1-inch x 4-inch rectangle both have the same area of 4 sq inches. However, the square has a perimeter of 8 inches while the rectangle has a perimeter of 10 inches. By the way, the shape with the largest area for a given perimeter is a circle.

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Area of equilateral triangle: 0.5*8*8*sin(60 degrees) = 27.7 square inches rounded

It is: 3*1 = 3 inches

12 inches

If a "1 inch triangle" means a triangle each of whose sides is 1 inch, then there is no answer to the question. These are equilateral triangles and equilateral triangles can tesselate to form a larger equilateral triangle. The fact that the large triangle is equilateral means that its three sides are equal so that its perimeter ie the sum of the three sides must be divisible by 3. 20 is not divisible by 3.

An equilateral 1 inch triangle is a plane figure and it does not have a cross-sectional area in any meaningful sense, just an area. Its area is 0.43 = sqrt(3)/4 square inches.

9

The formula to calculate the area of a triangle is (base/2) x height... therefore the are of the triangle in this case is 18 square inches

Area of a triangle = 1/2*base*height Use Pythagoras to find the height which is 7.794228634 inches Area = 1/2*9*7.794228634 = 35.07402885 square inches Answer: 35 square inches to the nearest square inch.

No. A triangle with 2-inch sides is not congruent with a triangle with 3-inch sides.

The formula for area of a triangle is bh/2 b=base h=height /=divide so multiply the base(or the bottom) side by the height of the triangle, and then divide that by two.

If square has a 28-inch perimeter its area is: 49 square inches.

The area of a regular hexagon with a 24-inch perimeter is about 41.57 square inches.

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