Объяснение:
Дано
FH - биссектриса
< FGN=43⁰
<NHF=91⁰
Найти
1. < NFG=?
2. < FNG=?
Решение
1. < NFG = < GFH + < HFN = 2×< GFH
< GHN= < GHF + < FHN
180⁰= < GHF + 91⁰
< GHF = 180⁰ - 91⁰ =89⁰
< GFH = 180⁰ - 43⁰ - 89⁰ = 48⁰
< NFG = 2×48⁰= 96⁰
2. < FNG = 180⁰- 96⁰- 43⁰ = 41⁰
Ответ: < NFG = 96⁰; < FNG = 41⁰
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Answers & Comments
Объяснение:
Дано
FH - биссектриса
< FGN=43⁰
<NHF=91⁰
Найти
1. < NFG=?
2. < FNG=?
Решение
1. < NFG = < GFH + < HFN = 2×< GFH
< GHN= < GHF + < FHN
180⁰= < GHF + 91⁰
< GHF = 180⁰ - 91⁰ =89⁰
< GFH = 180⁰ - 43⁰ - 89⁰ = 48⁰
< NFG = 2×48⁰= 96⁰
2. < FNG = 180⁰- 96⁰- 43⁰ = 41⁰
Ответ: < NFG = 96⁰; < FNG = 41⁰