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Pythagoras! If AB = 100m and BC = 75cm then AC = sqrt (10000 + 5625) = 125

Q: What is the diagonal line for a rectangle size 100m x 75cm?

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Yes, it is the line connecting opposite corners.

No. The diagonal through a rectangle can be computed via the Pythagorean theorem: c2 = a2 + b2 where c is the diagonal length and a and b are the horizontal and vertical lengths of the rectangle.

The diagonal length is about 18.44 inches.

No because diagonal lines do not count. Even though they might fit perfectly inside the rectangle, but those don't count. Only lines going horizontally or vertically count as lines of symmetry. :)

Actually, a rectangle has four lines of symmetry:One horizontal;One vertical; andTwo diagonal.

Related questions

The diagonal line of a rectangle for example is greater than its length.

No.

Yes, it is the line connecting opposite corners.

Using Pythagoras: 322+362 = 2320 and the square root of this is the length of the diagonal

No. The diagonal through a rectangle can be computed via the Pythagorean theorem: c2 = a2 + b2 where c is the diagonal length and a and b are the horizontal and vertical lengths of the rectangle.

The diagonal is approximately 38.42 feet.

No, it does not. Take a sheet of A4 paper and fold it across the diagonal, and you will see that the two halfs do not line up.

The diagonal length is about 18.44 inches.

To trisect a rectangle first draw the two diagonals (lines going from the top left corner, to the bottom right and top right to bottom left.) Where those two diagonals intersect is the center of the rectangle. Next, draw a line through the center of the rectangle that is parallel to the top and bottom of the rectangle. this should divide the rectangle into two halves. Next draw the diagonal for the top half of the rectangle (A line from the top left corner, to the middle of the right side.) Where this diagonal intersects with the diagonal of the diagonal of the entire rectangle is 1/3 the length. Repeat the previous step for the bottom half of the rectangle. The line connecting the top intersection, and the bottom intersection is the trisection line.

right triangles and

No because diagonal lines do not count. Even though they might fit perfectly inside the rectangle, but those don't count. Only lines going horizontally or vertically count as lines of symmetry. :)

Actually, a rectangle has four lines of symmetry:One horizontal;One vertical; andTwo diagonal.