1. The problem asks: How many radii are there in total if four circles are shown, each containing one or two radii? 2. Recall that a radius is a line segment from the center of a circle to its circumference. 3. According to the problem, the circles have the following radii counts: - Circle 1: 1 radius - Circle 2: 2 radii - Circle 3: 1 radius - Circle 4: 2 radii 4. To find the total number of radii, sum the radii from all circles: $$1 + 2 + 1 + 2 = 6$$ 5. Therefore, the total number of radii in all four circles is 6.