Step 1: Understanding Exterior Angles.
The sum of the exterior angles of any polygon, including a triangle, is always 360°. Since each right angle is 90°, the sum of the exterior angles of a triangle equals four right angles (4 × 90°).
Step 2: Verifying the Options.
- Option (1): Three right angles is incorrect.
- Option (2): Four right angles is correct, as the sum of the exterior angles of a triangle is always 360°.
- Option (3): Five right angles is incorrect.
- Option (4): Six right angles is incorrect.
Conclusion:
Therefore, the correct answer is (2) Four right angles.
Find the number of triangles in the given figure.

$PQ$ is a chord of length $4\ \text{cm}$ of a circle of radius $2.5\ \text{cm}$. The tangents at $P$ and $Q$ intersect at a point $T$. Find the length of $TP$.