Question

which figure shows a central angle?

Explanation:

A central angle is defined as an angle whose vertex is the center of a circle, with its sides being radii of the circle. The first figure has an angle formed by two radii with the vertex at the circle's center, matching this definition. The second figure shows an inscribed angle (vertex on the circle), the third shows an arc, and the fourth only shows a circle with its center.

Answer:

First figure (leftmost, with blue border: angle formed by two radii at the circle's center)