TEST YOUR SKILLS

The line segment joining the mid-points of any two sides of a triangle is parallel to the third side and it is _____ it. (equal to / half of)

In a parallelogram $\mathrm{A}\mathrm{B}\mathrm{C}\mathrm{D}$, if $\mathrm{\angle }\mathrm{C}=80°$, then what is the measure of $\mathrm{\angle }\mathrm{A}$?

In a parallelogram $\mathrm{A}\mathrm{B}\mathrm{C}\mathrm{D}$, if $\mathrm{\angle }\mathrm{A}=100°$ then what is the measure of $\mathrm{\angle }\mathrm{D}$?

In a parallelogram $\mathrm{A}\mathrm{B}\mathrm{C}\mathrm{D}$ if $\mathrm{\angle }\mathrm{A}$ is $\frac{4}{5}$ of $\mathrm{\angle }\mathrm{B}$, then what is $\mathrm{\angle }\mathrm{A}$?

Each side of a rhombus is$15 \mathrm{c}\mathrm{m}$. If, the length of one of its diagonals is $18 \mathrm{c}\mathrm{m}$, then what is the length of the other diagonal?

In the adjacent figure $\mathrm{A}\mathrm{B}\parallel \mathrm{Q}\mathrm{P}\parallel \mathrm{C}\mathrm{D}, \mathrm{Q}$ is the midpoint of $\mathrm{A}\mathrm{C}.$ If $\mathrm{A}\mathrm{B}=4 \mathrm{c}\mathrm{m}$ and $\mathrm{C}\mathrm{D}=6 \mathrm{c}\mathrm{m}$ then find $\mathrm{P}\mathrm{Q}.\mathrm{}$

In the given figure, The points $\mathrm{D}, \mathrm{E}, \mathrm{F}$ are the midpoints of the sides $\mathrm{AB}, \mathrm{AC}, \mathrm{BC}$ of the triangle $△\mathrm{ABC}$. Find the perimeter of $\mathrm{BDEF}$.

In the adjoining figure, $\mathrm{A}\mathrm{B}\mathrm{C}\mathrm{D}$ and $\mathrm{P}\mathrm{Q}\mathrm{RB}$ are rectangles where $\mathrm{Q}$ is the midpoint of $\mathrm{B}\mathrm{D}$. If $\mathrm{Q}\mathrm{R}=5 \mathrm{c}\mathrm{m}$, then find the length of $\mathrm{A}\mathrm{B}$.