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The formula for the area of a rhombus is [tex]A=\frac{1}{2} d_1 d_2[/tex], where [tex]d_1[/tex] and [tex]d_2[/tex] are the lengths of the diagonals.

Which are equivalent equations? Select two correct answers.

A. [tex]d_1=2 A d_2[/tex]

B. [tex]d_1=\frac{2 A}{d_2}[/tex]

C. [tex]d_2=\frac{d_1}{2 A}[/tex]

D. [tex]d_2=\frac{2 A}{d_1}[/tex]

E. [tex]d_2=2 A d_1[/tex]


Sagot :

To find the equivalent equations to the given area formula for a rhombus, [tex]\(A = \frac{1}{2} d_1 d_2\)[/tex], we need to rearrange the formula to solve for both [tex]\(d_1\)[/tex] and [tex]\(d_2\)[/tex].

1. Start with the original formula:
[tex]\[ A = \frac{1}{2} d_1 d_2 \][/tex]

2. Solving for [tex]\(d_1\)[/tex]:
- Multiply both sides by 2 to clear the fraction:
[tex]\[ 2A = d_1 d_2 \][/tex]
- Divide both sides by [tex]\(d_2\)[/tex] to solve for [tex]\(d_1\)[/tex]:
[tex]\[ d_1 = \frac{2A}{d_2} \][/tex]

3. Solving for [tex]\(d_2\)[/tex]:
- Again, start with:
[tex]\[ 2A = d_1 d_2 \][/tex]
- Divide both sides by [tex]\(d_1\)[/tex] to solve for [tex]\(d_2\)[/tex]:
[tex]\[ d_2 = \frac{2A}{d_1} \][/tex]

The equivalent equations are:
1. [tex]\(d_1 = \frac{2A}{d_2}\)[/tex]
2. [tex]\(d_2 = \frac{2A}{d_1}\)[/tex]

Based on these, the correct selections from the provided options are:

- [tex]\(d_1 = \frac{2 A}{d_2}\)[/tex]
- [tex]\(d_2 = \frac{2 A}{d_1}\)[/tex]

Therefore, the correct answers are:
[tex]\[ d_1 = \frac{2 A}{d_2}, \quad d_2 = \frac{2 A}{d_1} \][/tex]