How can we find area of a rhombus using herons formula
Rhombus:
A rhombus is a quadrilateral with four sides of equal length. The opposite angles of a rhombus are equal, and its diagonals bisect each other at right angles.
Heron's Formula:
Heron's formula is used to find the area of a triangle when the lengths of its sides are known. It states that the area (A) of a triangle with sides of length a, b, and c can be calculated using the formula:
A = sqrt(s(s-a)(s-b)(s-c))
where s is the semi-perimeter of the triangle, given by:
s = (a + b + c) / 2
Area of a Rhombus using Heron's Formula:
To find the area of a rhombus using Heron's formula, we can consider the rhombus as two congruent triangles and find the area of one of them. The formula becomes:
A = 2 * (Area of one triangle)
Step-by-Step Calculation:
1. Determine the lengths of the diagonals: The diagonals of a rhombus are perpendicular bisectors of each other and divide the rhombus into four congruent right triangles. Let d1 and d2 be the lengths of the diagonals.
2. Calculate the side length: Since the diagonals bisect the angles of the rhombus, we can use trigonometry to find the side length. Let θ be the measure of one of the angles.
- Divide one of the triangles into two right triangles by drawing a perpendicular from one of the vertices to the opposite diagonal.
- The length of half of one diagonal is the adjacent side, and the side length of the rhombus is the hypotenuse.
- Use the cosine function: cos(θ) = (d1/2) / s, where s is the side length.
3. Calculate the area of one triangle:
- Calculate the semi-perimeter: s = 2 * s = 2 * (side length)
- Use Heron's formula to find the area of one triangle: A = sqrt(s(s-a)(s-a)(s-a)).
4. Calculate the area of the rhombus:
- Multiply the area of one triangle by 2: A = 2 * A.
Example:
Let's consider a rhombus with diagonals of lengths 6 cm and 8 cm.
1. Determine the side length:
- Let d1 = 6 cm and d2 = 8 cm.
- The side length can be found using the cosine function: cos(θ) = (6/2) / s.
- Rearranging the formula, we get s = (6/2) / cos(θ).
2. Calculate the area of one triangle:
- Calculate the semi-perimeter: s = 2 * (6/2) / cos(θ).
- Use Heron's formula to find the area of one triangle: A = sqrt(s(s-a)(s-a)(s-a)).
3. Calculate the area of the rhombus:
- Multiply the area of one triangle by 2: A = 2 * A.
Note:
Make sure to use appropriate units for measurements and round the final answer to the desired
How can we find area of a rhombus using herons formula
We will firstly make a diagonal that will divide the rhombus into 2 triangles.Then we will find the length of the diagonal using pythagorus theorem.After that we will find the area of both the triangle using Heron's formula.
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