To determine the radian measure of angle $\theta$ based on the provided description, we need more information or details about the circle. Specifically:

1. The reference to "area of circle is 1 at the top and 2 at the bottom" is unclear. Are you referring to the radius, arc length, or some relationship involving the area of sectors?
2. If it's a circle divided into sectors, we would use the relationship between the arc length and radius to find $\theta$ in radians.
3. Are the sectors of the circle divided by $\theta$? If so, their areas may relate to the angle measure.

Please provide a little more clarification, or upload a diagram to give better context!

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Would you like help clarifying the setup, or any further details about how to approach problems involving radian measures?

Here are 5 related questions you might explore:

1. How are radians defined in terms of arc length and radius?
2. How can we calculate the angle of a sector when the area is known?
3. What is the difference between degrees and radians when measuring angles?
4. How does the area of a sector relate to the central angle in radians?
5. What is the formula to convert between radians and degrees?

Tip: A full circle in radians is always $2\pi$, no matter the size of the circle!