The sides of a rhombus ABCD measure 2 cm each and the difference betw...
Given:
- The sides of the rhombus ABCD measure 2 cm each.
- The difference between two angles is 90°.
To find:
- The area of the rhombus.
Let's analyze the given information and solve step by step.
1. Understanding the properties of a rhombus:
- A rhombus is a quadrilateral with all sides equal in length.
- Opposite angles in a rhombus are equal.
2. The sides of the rhombus measure 2 cm each:
- This means that all sides of the rhombus are equal in length, which satisfies the property of a rhombus.
3. The difference between two angles is 90°:
- Let's assume that the larger angle is A and the smaller angle is B.
- According to the property of a rhombus, opposite angles are equal. Therefore, angle C is also equal to angle B.
- The difference between angles A and B is 90°, which means that angle A is 90° greater than angle B.
- So, angle A = angle B + 90°.
4. Finding the measure of angle B:
- The sum of all angles in a quadrilateral is 360°.
- In a rhombus, all angles are equal. So, each angle is 360°/4 = 90°.
- Therefore, angle B = 90° - angle A.
5. Substituting the values to find the measure of angle B:
- angle B = 90° - angle A
- angle B = 90° - (angle B + 90°)
- angle B = -angle B
- 2 * angle B = 0
- angle B = 0°
6. Calculating the area of the rhombus:
- The area of a rhombus can be calculated using the formula: Area = (diagonal1 * diagonal2) / 2.
- The diagonals of a rhombus bisect each other at right angles.
- Let's assume that the diagonals of the rhombus ABCD are AC and BD.
- As the diagonals of a rhombus bisect each other at right angles, angle ABD is a right angle.
- Therefore, diagonal AC is the hypotenuse of right-angled triangle ABC.
- The sides of the triangle ABC are 2 cm (side of the rhombus) and 2 cm (half of the diagonal BD).
- Using the Pythagorean theorem, we can find the length of diagonal AC:
AC^2 = AB^2 + BC^2
AC^2 = 2^2 + 2^2
AC^2 = 4 + 4
AC^2 = 8
AC = √8 = 2√2 cm
- Now, we can calculate the area of the rhombus:
Area = (diagonal1 * diagonal2) / 2
Area = (2√2 * 2) / 2
Area = 2√2 sq. cm
Therefore, the correct answer is option B: 2√2 sq. cm.
The sides of a rhombus ABCD measure 2 cm each and the difference betw...
x + y = 90o
It is given that,
2x - 2y = 90o, x - y = 45o
Solving, we get
X = 67.5o and y = 22.5oConsider triangle ABC
BC/Sin X = AB/Sin Y = 2/Sin 90
Therefore, BC = 1.847
AB = 0.765
Area of triangle ABC = ½ (1.847) (0.765) = 0.764
Area of rhombus = 4 X 0.764 = 2.825