1. Se consideră triunghiul ABC, G centrul său de greutate și G' simetricul lui \( G \) față de punctul M, mijlocul segmentului [BC]. a) Să se arate că \( \overrightarrow{G^{\prime} G}=\overrightarrow{G^{\prime} B}+\overrightarrow{G^{\prime} C} \). b) Să se afle \( \alpha, \beta, \gamma \in \mathbb{R} \) pentru care \( \alpha \overrightarrow{G^{\prime} \mathbf{A}}+\beta \overrightarrow{G^{\prime} B}+\gamma \overline{G^{\prime} \mathbf{C}}=\overrightarrow{\mathbf{0}} \).

In \( \triangle \mathrm{TUV}, u=750 \mathrm{~cm}, v=670 \mathrm{~cm} \) and \( \angle \mathrm{T}=160^{\circ} \). Find the length of \( t \), to the nearest centimeter.

In \( \triangle \mathrm{NOP}, n=54 \) inches, \( o=97 \) inches and \( p=95 \) inches. Find the measure of \( \angle \mathrm{N} \) to the nearest degree.

Score: \( 2 / 3 \) Penalty: none Question In \( \Delta \mathrm{HIJ}, h=50 \mathrm{~cm}, i=95 \mathrm{~cm} \) and \( j=86 \mathrm{~cm} \). Find the measure of \( \angle \mathrm{J} \) to the nearest 10 th of a degree. Answer Attempt 1 out of 2

In \( \triangle \mathrm{TUV}, u=4.8 \mathrm{~cm}, v=4.4 \mathrm{~cm} \) and \( \angle \mathrm{T}=84^{\circ} \). Find the length of \( t \), to the nearest 1oth of a centimeter.

In \( \triangle \mathrm{STU}, u=3.6 \) inches, \( s=7.9 \) inches and \( \angle \mathrm{T}=68^{\circ} \). Find the length of \( t \), to the nearest 10th of an inch.