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1. if \\( \\overline{er} \\) is rotated about point \\( m \\) by \\( 30…

Question

  1. if \\( \overline{er} \\) is rotated about point \\( m \\) by \\( 30^{\circ} \\), then which of the following is true about the length of \\( \overline{er} \\) compared to the length of its image, \\( \overline{er} \\)?

(1) \\( er = 2er \\)
(2) \\( er = \frac{1}{2}er \\)
(3) \\( er = er \\)
(4) \\( er = er + 30 \\)

Explanation:

Step1: Propiedad de la rotación

La rotación es una transformación rígida. Las transformaciones rígidas preservan la longitud de los segmentos.

Answer:

  1. \( E'R' = ER \)