It depends on the angle. You can either use cosine or sine, the diagonal acting as the hypotenuse. Once you found one of the legs you can use Pythagorean and theorem, sine, cosine, or tangent to find the other leg. Finally you multiply the two legs together.
If you do not know what any of the stuff i just said means you can look back a couple of pages in the text book and learn it.
The diagonal multiplied by sin(angle) gives one side of the rectangle and the diagonal times cos(theta) gives the other. So the area is (diagonal)2 x cos(theta) x sin(theta).
You need to know more...either the angle or the length of one of the sides.
If the only known fact is the length of the diagonal then the width and length of the rectangle CANNOT be determined. The diagonal could be that of a square, or of a rectangle that is very long but quite narrow. Consequently at least one more fact is required such as; the dimension of either the length or the width, or the angle that the diagonal makes to the base of the rectangle or even the area of the rectangle.
15 units2
A = 48 units2
The diagonal multiplied by sin(angle) gives one side of the rectangle and the diagonal times cos(theta) gives the other. So the area is (diagonal)2 x cos(theta) x sin(theta).
You need to know more...either the angle or the length of one of the sides.
If the diagonal is 25m and the area is 168m2 then the longest edge of the rectangle will be 24m.
A regular quadrilateral is a square. As to the measure, the answer depends on the measure of WHAT? An angle, a side, the diagonal, area, perimeter, etc.
If the only known fact is the length of the diagonal then the width and length of the rectangle CANNOT be determined. The diagonal could be that of a square, or of a rectangle that is very long but quite narrow. Consequently at least one more fact is required such as; the dimension of either the length or the width, or the angle that the diagonal makes to the base of the rectangle or even the area of the rectangle.
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
15 units2
A = 48 units2
The diagonal is 15.620 meters.
If it's a rectangle and you know its length and height then use Pythagoras' theorem to find the length of its diagonal
The answer depends on what information you have about the rectangle: the area and width, or width and diagonal, area and perimeter or some other measures.
A = 168 in2