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A triangle was dilated by a scale factor of 4. If [tex]\tan(a^{\circ})=\frac{4}{3}[/tex] and [tex]\overline{FR}[/tex] measures 12 units, how long is [tex]\overline{FR}[/tex] after dilation?

A. [tex]\overline{\Sigma F}=6[/tex] units
B. [tex]\overline{\text{3}}=9[/tex] units
C. [tex]\overline{\text{BF}}=12[/tex] units
D. [tex]\overline{\sqrt{F}}=16[/tex] units

Sagot :

To determine the length of the side [tex]\(\overline{5}\)[/tex] of the triangle after dilation, follow these steps:

1. Understand the Given Information:
- We know [tex]\(\tan(a^\circ) = \frac{4}{3}\)[/tex], but this information isn't directly necessary for this particular calculation involving the side length.
- The original side length [tex]\(\overline{FR}\)[/tex] of the triangle is 12 units.
- The triangle was dilated by a scale factor of 4.

2. Dilation Calculation:
- The effect of dilation on a geometric figure is to multiply every side by the scale factor.
- Therefore, if the original side length [tex]\(\overline{FR} = 12\)[/tex] units, when the triangle is dilated by a scale factor of 4, the new length of [tex]\(\overline{FR}\)[/tex] becomes:
[tex]\[ \overline{FR_{\text{scaled}}} = \overline{FR} \times \text{scale factor} = 12 \times 4 \][/tex]

3. Compute the New Side Length:
- Perform the multiplication to find the new length:
[tex]\[ \overline{FR_{\text{scaled}}} = 48 \][/tex]

Thus, after the dilation by a scale factor of 4, the length of [tex]\(\overline{FR}\)[/tex] is 48 units.
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