Bonsoir,
a) la somme des angles d'un triangle = 180°
donc : angle TMR = 180° - (90° + 54°) = 36°
b) angle HTR = 180 - (90 + 54) = 36°
angle MTH = angle MTR - angle HTR = 90° - 36° = 54°
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Bonsoir,
a) la somme des angles d'un triangle = 180°
donc : angle TMR = 180° - (90° + 54°) = 36°
b) angle HTR = 180 - (90 + 54) = 36°
angle MTH = angle MTR - angle HTR = 90° - 36° = 54°