Предмет: Геометрия, автор: 1qqzzz

Помогите пожалуйста )

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Автор ответа: oletchka1

0

14) ∠А=х, ∠В=3х, т.к сумма ∠ в Δ=180, то сост уравн:
х+3х+90=180
4х=180-90
4х=90
х=22,5
∠А=22,5
22,5×3=67,5
∠В=67,5
15) 180-50=130
130÷2=65
∠АСВ=65°
∠ВСD=180-65=115°
∠ВСD=115°
16) ∠АВС=180-(42+42)=96°
∠АВС=96°

Автор ответа: oletchka1

0

29) SOT=25 TOP =25/2=12.5 OPS=180-(90+12.5)=77.5

Автор ответа: 1qqzzz

0

спасибо

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