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Proof: Diagonals of a Rhombus are Perpendicular Bisectors of one another Video Lecture | Mathematics (Maths) Class 8

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FAQs on Proof: Diagonals of a Rhombus are Perpendicular Bisectors of one another Video Lecture - Mathematics (Maths) Class 8

1. What is a rhombus?
A rhombus is a quadrilateral with all four sides of equal length. It has opposite parallel sides and opposite equal angles.
2. How do you prove that the diagonals of a rhombus are perpendicular bisectors of one another?
To prove that the diagonals of a rhombus are perpendicular bisectors of one another, we can use the properties of a rhombus. Since a rhombus has all four sides of equal length, the diagonals will also be of equal length. Moreover, the angles formed by the diagonals and the sides of the rhombus are congruent. By using these properties, we can prove that the diagonals of a rhombus are perpendicular bisectors of one another.
3. Can you provide a step-by-step proof for the statement?
Certainly! Here is a step-by-step proof for the statement: Step 1: Draw a rhombus and label its vertices as A, B, C, and D. Step 2: Draw the diagonals of the rhombus, connecting vertices A and C, and vertices B and D. Step 3: Since all four sides of the rhombus are equal, we can say that AB = BC = CD = DA. Step 4: By the definition of a rhombus, opposite angles are congruent. Therefore, we have ∠ABC = ∠BCD and ∠ABD = ∠CDA. Step 5: Consider the triangles ABC and ACD. By side-angle-side congruence, we can prove that these triangles are congruent. Step 6: Since the triangles are congruent, the corresponding parts are congruent. Therefore, AC = AC and ∠DAC = ∠BAC. Step 7: From step 4, we know that ∠ABD = ∠CDA. Since AC = AC, triangle ACD is isosceles. Step 8: In an isosceles triangle, the altitude from the vertex bisects the base and is perpendicular to it. Therefore, AD is perpendicular to BC and BD is perpendicular to AC. Step 9: Similarly, we can prove that BC is perpendicular to AD and AC is perpendicular to BD. Step 10: Thus, the diagonals of the rhombus are perpendicular bisectors of one another.
4. What are the properties of a rhombus?
A rhombus has the following properties: - All four sides are of equal length. - Opposite sides are parallel. - Opposite angles are congruent. - Diagonals bisect each other at right angles. - The diagonals are of equal length.
5. Can the diagonals of a rhombus be of different lengths?
No, the diagonals of a rhombus cannot be of different lengths. Since a rhombus has all sides of equal length, the diagonals will also be of equal length. The diagonals of a rhombus bisect each other at right angles, and their lengths are determined by the side lengths of the rhombus.
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