To show triangles are congruence they are four ways. 1  If all three sides of triangle are same then they are congruent. (SSS) 2  If two sides of triangle and the angle connecting them are the same ( SAS) 3  Two angles and a corresponding side (ASA or AAS) 4  Right angled triangles only the hypotenuse and one side are the equal (RHS)
The severity of symptoms is related to the severity of the fever. Fever and systemic symptoms typically last 3 days, occasionally up to 4-8 days, and gradually diminish; however, cough and malaise may persist for more than 2 weeks. Second fever spikes are rare. The physical findings are summarised in table 3. Full recovery may take 1-2 weeks, or longer, especially in the elderly. Table 3. Physical findings of uncomplicated influenza. Fever: rapidly peaking at 38-40Â°C (up to 41Â°C, especially in children), typically lasting 3 days (up to 4-8 days), gradually diminishing; second fever spikes are rare.
The typical flu incubation period is  between 24 hours and four days, with the average being two days. This means that if you are exposed to the influenza virus and become infected, you will start to experience flu symptoms anywhere between 24 hours and four days after the exposure. Another factor that contributes to how the flu spreads is when exactly you may be contagious.