Rectangular function and triangular pulse signal

Rectangular Function

A signal is said to be rectangular function type if it satisfies the following condition −

π(tτ)={1,0,fort≤τ2Otherwise$$\pi (\frac{t}{\tau })=\{\begin{array}{ll}1,& fort\le \frac{\tau }{2}\\ 0,& Otherwise\end{array}$$

Being symmetrical about Y-axis, this signal is termed as even signal.

Triangular Pulse Signal

Any signal, which satisfies the following condition, is known as triangular signal.

Δ(tτ)={1−(2|t|τ)0for|t|<τ2for|t|>τ2$$\mathrm{\Delta }(\frac{t}{\tau })=\{\begin{array}{ll}1-(\frac{2|t|}{\tau })& for|t|<\frac{\tau }{2}\\ 0& for|t|>\frac{\tau }{2}\end{array}$$

This signal is symmetrical about Y-axis. Hence, it is also termed as even signal.