用生动有趣动画方式让学生轻松理解---Here is the extraction of the content from the image: **Title:** 六下数学期末总复习图形与几何专项小纸条 **Subtitle:** 姓名：_______ **Section One: 填空专项 (每天4道, 巩固所学知识, 及时查漏补缺)** 1. 一个三角形, ∠1=60°, ∠2=45°, ∠3=_______, 这个三角形是_______三角形. 2. 一个三角形中, 最大的角是78°, 按角分, 这个三角形是_______三角形. 3. 大小两个正方体棱长的比是3:1, 这两个正方体体积的比是_______, 表面积的比是_______ . 4. 用棱长1分米的小正方体堆成一个棱长是1米的正方体, 需要_______个, 把这些小正方体挨个排成一行, 长是_______米. **Section Two: 图形计算专项 (每天2道, 巩固所学知识, 及时查漏补缺)** 1. 求阴影部分面积. (单位: 厘米) **Diagram Description for Problem 1:** * **Type:** Geometric figure. * **Elements:** * A sector of a circle on the left, with a radius of 10 cm. It appears to be a quarter circle (90-degree sector). The lower horizontal edge is labeled "10 cm". The vertical edge on the right is labeled "10 cm". A point is labeled "E(中心)" which translates to "E (Center)". This suggests E is the center of the circle from which the sector is cut. * A right-angled triangle positioned to the right of the sector, sharing the vertical edge of length 10 cm. The base of the triangle appears to be horizontal, extending to the left from the bottom-right corner of the vertical edge. This diagram seems incorrect or confusing as depicted. However, based on the shaded area and the labels, it appears to be asking for the shaded area of a figure composed of a triangle and a sector. The shaded area is the triangle portion. * The triangle has a height of 10 cm (the shared vertical edge). The base is labeled "10 cm" below the horizontal axis of the diagram. This indicates the triangle is a right-angled triangle with legs of 10 cm and 10 cm. * The shaded area is the triangle. * **Units:** cm (厘米) 2. 求阴影部分的面积. (单位: 厘米) **Diagram Description for Problem 2:** * **Type:** Geometric figure. * **Elements:** * A square. The side length is indicated by a double-headed arrow below the square, labeled "8". This means the side length of the square is 8 cm. * Two quarter circles are drawn inside the square. * One quarter circle is centered at the bottom-right corner of the square, with a radius equal to the side length of the square (8 cm). It covers the top-left area of the square. * Another quarter circle is centered at the top-left corner of the square, also with a radius equal to the side length of the square (8 cm). It covers the bottom-right area of the square. * The unshaded region in the center is the intersection of the two quarter circles. * The shaded regions are the two areas in the top-right and bottom-left corners of the square, which are outside the union of the two quarter circles. These shaded areas are complementary to the area covered by the union of the two quarter circles within the square. * **Units:** cm (厘米)