∠B=78° ,∠MAC-?
ΔABC- равнобедренного:
∠A=∠C=180°-78°/2=51°
ΔAMC:
∠M=90° , ∠C=51°
∠MAC+∠M+∠C=180°
∠MAC=180°-90°-51°=39°
ОТВЕТ:∠MAC=39°
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∠B=78° ,∠MAC-?
ΔABC- равнобедренного:
∠A=∠C=180°-78°/2=51°
ΔAMC:
∠M=90° , ∠C=51°
∠MAC+∠M+∠C=180°
∠MAC=180°-90°-51°=39°
ОТВЕТ:∠MAC=39°