Finding the Rectangle Diagonal Length
To find the length of the diagonal of a rectangle, we can use the Pythagorean theorem. The theorem states that in a right-angled triangle, the square of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides. In a rectangle, the length, width, and diagonal form a right-angled triangle.
Applying the Pythagorean Theorem
Let the length of the rectangle be '$l$' and the width be '$w$'. Let the diagonal be '$d$'. According to the Pythagorean theorem:
$d^2 = l^2 + w^2$
Calculating the Diagonal
Given:
- Length, $l = 9$ cm
- Width, $w = 5$ cm
Substitute the values into the formula:
$d^2 = 9^2 + 5^2$
$d^2 = 81 + 25$
$d^2 = 106$
To find the diagonal '$d$', take the square root of both sides:
$d = \sqrt{106}$
Since length must be a positive value, we only consider the positive square root.
Conclusion
The length of the diagonal is $\sqrt{106}$ cm.
Similar Questions
- A square is inscribed in a circle which is inscribed in an equilateral triangle. If one side of the triangle is $x$, then the area of square is:
- A path around the inner side of a rectangular park measuring $37\text{ m} \times 30\text{ m}$ occupies $570\text{ m}^{2}$. What is the width of the path?
- The two unequal sides of a rectangle are in the ratio of 3 : 4. If the perimeter is 42 cm, then the length of diagonal will be:
- Four cows are tethered to the four corners of a square field of length 28 m so that each cow can just touch the two cows in the adjacent corners. If the grass in the area inside the square field that was accessible to the cows was enough to feed them for 22 days, for how many days would the grass that is beyond the reach of these cows be able to feed them if someone cuts it and leaves it inside the grazable parts? [Use $\pi = 22/7$]
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Important Questions from 2-D Mensuration
- The length of a rectangular plot is $(x^2 + xy + y^2)$ m and its breadth is $(x^2 - 5xy - y^2)$ m.
Find its perimeter, when $x = 1$ and $y = -1$. - The ratio between the perimeter and breadth of a rectangle is 3: 1. If the area of the rectangle is $98 \text{ cm}^2$, find the perimeter (in cm) of the rectangle.
The shorter side of a rectangle is 15 cm less than the longer side. The numerical value of its area is equal to 5 times the numerical value of its perimeter. What is the length (in cm) of its longer side?
- In a circle of radius 10.5 cm, if the angle of a sector is $\frac{2\pi}{3}$, then the perimeter of the sector is (in cm):
(Take $\pi = \frac{22}{7}$) - Find the circumference (in m) of the largest circle that can be inscribed in a rectangle whose dimensions are given as 114 m and 63 m.
Take $\pi = \frac{22}{7}$
