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Question-138401




Question Number 138401 by Bekzod Jumayev last updated on 13/Apr/21
Commented by Bekzod Jumayev last updated on 13/Apr/21
Help?
$${Help}? \\ $$
Commented by Bekzod Jumayev last updated on 13/Apr/21
Please help?
$$\boldsymbol{{Please}}\:\boldsymbol{{help}}? \\ $$
Commented by mr W last updated on 13/Apr/21
∠EFD=90/2=45°=ϕ  ∠FDE=120/2=60°  ∠DEF=150/2=75°
$$\angle{EFD}=\mathrm{90}/\mathrm{2}=\mathrm{45}°=\varphi \\ $$$$\angle{FDE}=\mathrm{120}/\mathrm{2}=\mathrm{60}° \\ $$$$\angle{DEF}=\mathrm{150}/\mathrm{2}=\mathrm{75}° \\ $$
Commented by Bekzod Jumayev last updated on 13/Apr/21
Thank you sir!
$${Thank}\:{you}\:{sir}! \\ $$
Commented by mr W last updated on 15/Apr/21
general case see Q138519
$${general}\:{case}\:{see}\:{Q}\mathrm{138519} \\ $$

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