Step 1: Understanding the Angle Sum of a Quadrilateral.
The sum of the interior angles of any quadrilateral is always 360°. This can be divided into four right angles, as each right angle measures 90°. Step 2: Verifying the Options.
- Option (1): Three right angles would sum to 270°, which is incorrect.
- Option (2): Five right angles would sum to 450°, which is incorrect.
- Option (3): Four right angles add up to 360°, making this the correct answer.
- Option (4): Six right angles is incorrect.
Conclusion:
Therefore, the correct answer is (3) Four right angles.
Find the number of triangles in the given figure.
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.