$(1)$ If a planar region formed by a figure $T$ is made up of two non-overlapping planar regions formed by figures $P$ and $Q$,then $\operatorname{ar}(T) = \dots$
$(2)$ Area of a parallelogram $= \dots$

(N/A) $(1)$ The area of a figure $T$ is the sum of the areas of the two non-overlapping regions $P$ and $Q$. Therefore,$\operatorname{ar}(T) = \operatorname{ar}(P) + \operatorname{ar}(Q)$.
$(2)$ The area of a parallelogram is given by the product of its base and the corresponding altitude (height) to that base. Therefore,$\text{Area} = \text{base} \times \text{corresponding altitude}$.