Prove: RSTU is a square.

| Statements | Reasons |
|-------------------------------------------|-------------------------------------------------------------------------|
| 1. [tex]\(RSTU\)[/tex] is a rectangle with vertices [tex]\(R(0,0)\)[/tex], [tex]\(S(0, a )\)[/tex], [tex]\(T( a , a )\)[/tex], and [tex]\(U( a , 0)\)[/tex] | 1. Given |
| 2. [tex]\(RS = a\)[/tex] units | 2. ? |
| 3. [tex]\(ST = a\)[/tex] units | 3. Distance formula |
| 4. [tex]\(\overline{RS} \cong \overline{ST}\)[/tex] | 4. ? |
| 5. [tex]\(RSTU\)[/tex] is a square | 5. ? |

What is the correct order of reasons that complete the proof?

A. Definition of congruence; distance formula; if two consecutive sides of a rectangle are congruent, then it is a square

B. If two consecutive sides of a rectangle are congruent, then it is a square; distance formula; definition of congruence

C. Distance formula; definition of congruence; if two consecutive sides of a rectangle are congruent, then it is a square

D. Distance formula; if two consecutive sides of a rectangle are congruent, then it is a square; definition of congruence



Answer :

To prove that [tex]\( RSTU \)[/tex] is a square, we need to follow logical steps with accurate justifications for each statement. Below is the solution outlined step-by-step with the correct order of reasons:

1. Statements and Reasons:

[tex]\[ \begin{array}{|l|l|} \hline \multicolumn{1}{|c|}{\text{Statements}} & \multicolumn{1}{c|}{\text{Reasons}} \\ \hline 1. \, RSTU \, \text{is a rectangle with vertices} \, R (0,0), S (0, a ), T ( a , a ), & 1. \, \text{given} \\ U \, ( a , 0) & \\ \hline 2. \, RS = a \, \text{units} & 2. \, \text{distance formula} \\ \hline 3. \, ST = a \, \text{units} & 3. \, \text{distance formula} \\ \hline 4. \, \overline{RS} \cong \overline{ST} & 4. \, \text{definition of congruence} \\ \hline 5. \, RSTU \, \text{is a square} & 5. \, \text{If two consecutive sides of a rectangle are congruent, then it's a square} \\ \hline \end{array} \][/tex]

Now we can identify the correct order of reasons to complete the proof from the given options:

2. [tex]\( \text{distance formula} \)[/tex]
3. [tex]\( \text{distance formula} \)[/tex]
4. [tex]\( \text{definition of congruence} \)[/tex]
5. [tex]\( \text{If two consecutive sides of a rectangle are congruent, then it's a square} \)[/tex]

Thus, the correct answer is:

C. distance formula; definition of congruence; if two consecutive sides of a rectangle are congruent, then it's a square

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