Search any question & find its solution
Question:
Answered & Verified by Expert
Let $\mathrm{P}$ be an interior point of a triangle $\mathrm{ABC}$. Let $\mathrm{Q}$ and $\mathrm{R}$ be the reflections of $\mathrm{P}$ in $\mathrm{AB}$ and $\mathrm{AC}$, respectively. IF $\mathrm{Q}, \mathrm{A}, \mathrm{R}$ are collinear then $\angle A$ equals.
Options:
Solution:
1110 Upvotes
Verified Answer
The correct answer is:
$90^{\circ}$
So from Diagram
$$
\begin{array}{l}
\theta+\theta+\phi+\phi=180^{\circ} \\
\angle \mathrm{A}=\theta+\phi=90^{\circ}
\end{array}
$$
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.