Q: What theorem will you use to find the diagonal of a 20M by 16Cm rectangle?

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If they are the dimensions of a rectangle then use Pythagoras' theorem to find the length of the diagonal.

Divide the rectangle in two triangles and then use the pythagorean theorem to find the remaining sides.

length2+width2 = diagonal2 and the square root of this is the size of the diagonal

With Pythagoras' theorem: diagonal2- length2 = width2

First divide the perimeter by 2 then subtract the diagonal from this. The number left with must equal two numbers that when squared and added together equals the diagonal when squared (Pythagoras' theorem) These numbers will then be the length and height of the rectangle.

Related questions

If they are the dimensions of a rectangle then use Pythagoras' theorem to find the length of the diagonal.

Divide the rectangle in two triangles and then use the pythagorean theorem to find the remaining sides.

if a rectangle has width of 5 and diagonal with lenght of 13, what is the area of the rectangle? Use Pythagoras' theorem to find the length of the rectangle which will be 12 5*12 = 60 square units

length2+width2 = diagonal2 and the square root of this is the size of the diagonal

To find the diagonal length of a rectangle use Pythagoras' theorem for a right angle triangle.

Use Pythagoras' theorem to find the length of the diagonal of a rectangle.

12 Pythagorean theorem

With Pythagoras' theorem: diagonal2- length2 = width2

By the Pythagorean Theorem, the diagonal is the hypotenuse of the right triangle formed by the diagonal and the two included sides. c2 = a2 + b2 so the diagonal is the square root of the sum of the squares of the rectangle's length and width. Example : for a rectangle 4 x 3, the diagonal is sqrt(32 + 42) = sqrt (25) = 5

Using Pythagoras' theorem it is about 10.81665383 inches.

Answers2 + t2 = length of diangnal2

First divide the perimeter by 2 then subtract the diagonal from this. The number left with must equal two numbers that when squared and added together equals the diagonal when squared (Pythagoras' theorem) These numbers will then be the length and height of the rectangle.