Предмет: Геометрия, автор: LOL225LOL

помогите решить пожалуйста!!!

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Автор ответа: garist300
0
1в-1
внешние и внутренние углы- смежные. значит эти углы будут по 180-114=66 градусов
Автор ответа: ssoxo
0
1. Углы при основании равны (180-114)/2=33°.
Внешние углы равны: 1). 180-114=66°
2) и 3) 180-33=147°.
2. Описаны диагонали параллелограмма, в котором они пересекаясь делятся пополам. В параллелограмме противоположные стороны параллельны и равны.
KLMN - параллелограмм, значит KM=LN, KN=LM.
3. Катет ВС лежит напротив угла в 30°, значит он вдвое меньше гипотенузы. АВ=2ВС.
АВ-ВС=ВС=7.5 см.
АВ=7.5·2=15 см - это ответ.
4. Тупой угол между гипотенузой и биссектрисой будет со стороны острого угла тр-ка, который меньше 45°.
31°<45°, значит тупой угол равен 180-45-31=104° - это ответ.
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