If the measure of angle 3 is equal to \((2x + 6)^{\circ}\) and \(x = 7\), which statements are true? Check all that apply.

A. The measure of angle 6 is \(20^{\circ}\).
B. The measure of angle 5 is \(70^{\circ}\).
C. The measure of angle 2 is [tex]\(80^{\circ}\)[/tex].



Answer :

Alright, let's solve this step by step.

1. Determine the measure of angle 3:
- We are given the expression for the measure of angle 3 as \((2x + 6)^{\circ}\).
- We know that \(x = 7\), so we substitute \(x\) with 7 in the expression for angle 3.
[tex]\[ \text{Measure of angle 3} = 2(7) + 6 = 14 + 6 = 20^{\circ} \][/tex]

2. List the given measures of other angles:
- Measure of angle 6 is \(20^{\circ}\).
- Measure of angle 5 is \(70^{\circ}\).
- Measure of angle 2 is \(80^{\circ}\).

3. Compare the measure of angle 3 with the given angles:
- The measure of angle 3 is \(20^{\circ}\).
- We compare this value with the given angles' measures:
- Measure of angle 6 is \(20^{\circ}\) \( \Rightarrow \) This statement is true.
- Measure of angle 5 is \(70^{\circ}\) \( \Rightarrow \) This statement is false.
- Measure of angle 2 is \(80^{\circ}\) \( \Rightarrow \) This statement is false.

4. Identify the true statements:
- The only true statement is: The measure of angle 6 is \(20^{\circ}\).

Therefore, the correct answer is:
- The measure of angle 6 is \(20^{\circ}\).

The statements "The measure of angle 5 is [tex]\(70^{\circ}\)[/tex]" and "The measure of angle 2 is [tex]\(80^{\circ}\)[/tex]" are not true.

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