Предмет: Геометрия, автор: BloodMambet

2. В прямоугольном треугольнике MNK, угол N прямой. MLN=72°, ML- биссектриса угла М. Найдите K.

Ответы

Автор ответа: DiRaNs

2

Ответ:

∠К=54°

Объяснение:

∠MNК=∠NLM+90°+72°=180° ⇒ ∠NLM=18°

∠NМК=∠NLM+∠LMК=18°+18°=36°

ΔNMК=90°+36°+∠К=180° ⇒ ∠К=54°

Автор ответа: dodolddiodleoe

0

ответ: 54 градуса
пояснение: рассмотрим треугольник MLN, сумма углов в треугольнике =180 градусов, тогда угол NML = 180 - (N + MLN)= 180 - (90+72)=18 градусов. тк ML биссектриса, то угол LMK=18 градусов. рассмотрим треугольник LMK. угол MLN и MLK смежные, значит MLK=180-72=108 градусов. сумма углов в треугольнике равна 180-(LMK+MLK)= 180-(18+108)= 54 градуса

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"Bushy?"
The first man grinned: "You know. Coloured, half- caste!" He spat out the word with contempt.
The other nodded and pointed at Lanny: "He's pretty, isn't he? I bet you a tailor made that suit for him. And look at his shoes."
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“What do you mean?”
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