生成该题目的讲题视频，要求用画图的方式讲解呈现，讲解结构按照读题身体，思路启发，步骤讲解等顺序完成，要求时间控制在2分钟左右---**Question Stem:** 淘气有两根塑料小棒,如下图所示。(单位:厘米) 他想剪断其中一根,把剪后的三根小棒首尾相连围一个三角形。以下四种剪法中,可以围成三角形的是( )。 **Translation of Question Stem:** Taoqi has two plastic sticks, as shown in the figure below. (Unit: cm) He wants to cut one of them, and connect the three sticks end-to-end to form a triangle. Among the following four cutting methods, which one can form a triangle? **Initial Diagram Description:** * **Type:** Diagram illustrating two line segments (representing plastic sticks) with their lengths indicated. * **Elements:** * A top horizontal line segment, labeled "8". This represents a plastic stick of 8 cm length. It has 8 equal markings along its length. * A bottom horizontal line segment, labeled "5". This represents a plastic stick of 5 cm length. It has 5 equal markings along its length. * **Context:** These are the initial sticks available. **Options:** To determine which cutting method can form a triangle, we need to apply the Triangle Inequality Theorem: The sum of the lengths of any two sides of a triangle must be greater than the length of the third side. **Option A:** * **Diagram Description:** Shows the 8 cm stick untouched. The 5 cm stick is shown with a pair of scissors indicating a cut at its midpoint (at the 2.5 cm mark). * **Resulting Stick Lengths:** * One stick: 8 cm * Two sticks: 2.5 cm, 2.5 cm (from cutting the 5 cm stick in half) * **Check Triangle Inequality:** * 2.5 + 2.5 = 5. Is 5 > 8? No. * **Conclusion:** Cannot form a triangle. **Option B:** * **Diagram Description:** Shows the 8 cm stick untouched. The 5 cm stick is shown with a pair of scissors indicating a cut approximately 1 cm from its left end. * **Resulting Stick Lengths:** * One stick: 8 cm * Two sticks: 1 cm, 4 cm (from cutting the 5 cm stick into pieces of 1 cm and 4 cm) * **Check Triangle Inequality:** * 1 + 4 = 5. Is 5 > 8? No. * **Conclusion:** Cannot form a triangle. **Option C:** * **Diagram Description:** Shows the 5 cm stick untouched. The 8 cm stick is shown with a pair of scissors indicating a cut at its midpoint (at the 4 cm mark). * **Resulting Stick Lengths:** * One stick: 5 cm * Two sticks: 4 cm, 4 cm (from cutting the 8 cm stick in half) * **Check Triangle Inequality:** * 4 + 4 = 8. Is 8 > 5? Yes. * 4 + 5 = 9. Is 9 > 4? Yes. * **Conclusion:** Can form a triangle. (This option satisfies the triangle inequality for all combinations of sides). **Option D:** * **Diagram Description:** Shows the 5 cm stick untouched. The 8 cm stick is shown with a pair of scissors indicating a cut approximately 1 cm from its right end (or 7 cm from its left end). * **Resulting Stick Lengths:** * One stick: 5 cm * Two sticks: 7 cm, 1 cm (from cutting the 8 cm stick into pieces of 7 cm and 1 cm) * **Check Triangle Inequality:** * 1 + 5 = 6. Is 6 > 7? No. * **Conclusion:** Cannot form a triangle.