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Because - if you draw lines at right-angles from the base of a triangle vertically until they reach the highest point, then draw a horizontal line that connects those points, touching the highest point of the triangle - the area outside the triangle (but inside the resulting quadrilateral) is exactly half the area of the quadrilateral.

Q: Why do you need to multiply the area of a triangle by a half?

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1/2bh b=base h=height To find the are of a triangle,you have to multiply the base times height and divide the answer by 2. To find the area of a triangle you need to multiply all the sides of the triangle and then divide by 2.

You need to measure how wide it is and the height of the triangle then multiply them together and the you get your answere.

to find the surface area of the triangle we just need to multiply the length with breath. area=lengthXbreadth

yes. the formula is (1/2)bh. (half times width times height)

They need not be. A bigger triangle can have the same area as a small parallelogram.They need not be. A bigger triangle can have the same area as a small parallelogram.They need not be. A bigger triangle can have the same area as a small parallelogram.They need not be. A bigger triangle can have the same area as a small parallelogram.

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1/2bh b=base h=height To find the are of a triangle,you have to multiply the base times height and divide the answer by 2. To find the area of a triangle you need to multiply all the sides of the triangle and then divide by 2.

You need to measure how wide it is and the height of the triangle then multiply them together and the you get your answere.

In order to find the area of a triangle, you need to multiply the base of the triangle with the height of the triangle and then halve your final answer.The formula is (Base x Height) / 2Using that, the area of a triangle can be found.Hope that helps.Jamz159

Because in effect a triangle is half of a 4 sided quadrilateral

To work out the area of the rectangular faces, you need to multiply the length by the width. You then need to multiply that answer by 3 (because there are 3 rectangular faces).To work out the area of the triangular faces, multiply the base of the triangle by the height and divide the answer by 2 (to find the area of one triangle). You then need to multiply it by 2 again because there are 2 triangular faces.Important: The height of a triangle is the distance from the top corner of the triangle down to the base (so that it meets the base at 90 degrees)You then need to add the total surface area of the rectangular faces to the surface area of the triangular faces to get the total surface area of the entire prism.(sorry for the essay :])

To get the area of an equilateral triangle, you just need to know the length of one side. Multiply the length of one side by the square root of three and then divide the product by four, and you will get the area of the triangle.

You need to calculate the area of the base (square), and the area of one triangle, and multiply that by 4.

to find the surface area of the triangle we just need to multiply the length with breath. area=lengthXbreadth

You need to know the base and height of the triangle. Once you found these multiply together and divide by two.

The answer is 84 because you need to multiply the height and base which is 14 and 12 which equals 168. But because the triangle is halve of a square you need to divided the answer by 2 which is 168 divided by 2 equals 84.

yes. the formula is (1/2)bh. (half times width times height)

They need not be. A bigger triangle can have the same area as a small parallelogram.They need not be. A bigger triangle can have the same area as a small parallelogram.They need not be. A bigger triangle can have the same area as a small parallelogram.They need not be. A bigger triangle can have the same area as a small parallelogram.