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对 《 勾股定理 》 专题复习的认识

对 《 勾股定理 》 专题复习的认识

初中数学“四基”教学研究系列活动. 对 《 勾股定理 》 专题复习的认识. 单位: 66 中学 姓名 : 周岩 2014年9月4日星期四. 一、核心内容归纳:. 基本知识: 勾股定理及逆定理. 一、核心内容归纳:. 基本技能: 体验勾股定理的探索过程,会运用勾股定理解决简单问题;会用勾股定理的逆定理判定直角三角形。. 一、核心内容归纳:. 基本思想与方法: 数形结合,分类讨论,方程思想,转化化归,由特殊到一般,数学建模。. 一、核心内容归纳:. 基本经验:

By norah
(212 views)

多面体之复习

多面体之复习

多面体之复习. 主讲 何晓华. 制作 何晓华. 棱锥. 棱柱. 多面体. 凸多面体. 平行 六面体. 棱台. 多面体分类:. 多面体分类:. 凹多面体. 多面体. 棱柱. 直棱柱. 正棱柱. 棱锥. 正棱锥. 凸多面体. 棱台. 正棱台. 其他 (暂不研究). 棱柱:. 定义重现:. 有两个面互相平行,其余各面都是四边形,并且每相邻的两个四边形的公共边都互相平行,由这些面所围成的几何体叫做棱柱。. 重要性质:. 1、 侧棱都平行且相等,侧面都是平行四边形. 2、 平行于底面的截面与底面是全等的多边形.

By spencer
(205 views)

操作:

操作:

操作:. 给定一个圆,画三条线,组成一幅图形,并说明你们组画的图形中所蕴涵的数学知识。. 应用:. y. B. .. .. A. .. D. x. O. .. C. 1、正方形网格中,每个小正方形的边长为 1 个单位,以 O 为原点建立平面直角坐标系。 A 点的坐标为( 3 ,1),⊙ A 的半径为 5 ,. ( 1 )⊙ A 向左平移 5 个单位,它和 y 轴的位置关系是 ;. ( 2 )⊙ A 如何上下平移使得它与 x 轴相切?. 应用:. B. .. M. A. O. N.

By fallon-pittman
(61 views)

3cm

3cm

Chris McAree , Trinity School, Cumbria. 3cm. 4cm. 2cm. 6cm. 2cm. 6cm. 4cm. 4cm. 6cm. 10cm. 10cm. 5cm. 3cm. 10cm. 5cm. 6cm. 12cm. 6cm. 7cm. 3cm. 2cm. 4cm. 5cm. 6cm. 4cm. 3cm. 4cm. 4.5cm. 3cm. 9cm. 4cm. 5cm. 3cm. 12cm. 7cm. 5cm.

By virginia-boone
(131 views)

THE PERIMETER 100 GAME

THE PERIMETER 100 GAME

THE PERIMETER 100 GAME. Work out the perimeter around the edge of the shapes Point to the answer before your opponent to win!. GET READY. ROUND 1 MATCH 1. 4 cm. 4 cm. 75cm. 72cm. 44cm. 21cm. 90cm. 46cm. 63cm. 18cm. 65cm. 22cm. 57cm. 50cm. 24cm. 98cm. 70cm. 55cm. 58cm. 16cm.

By beau-johnson
(175 views)

Similar triangles: Missing sides

Similar triangles: Missing sides

Similar triangles: Missing sides. 8cm. 80 o. 70 o. Intelligent Practice. Silent Teacher. Narration. Your Turn. 4cm. 80 o. 6cm. 70 o. 8cm. Practice. What is the scale factor? Find the missing lengths. Triangles not drawn to scale. Example. Your turn. 4cm. 90 o. 3÷2 = 1.5cm.

By vhobbs
(9 views)

On your whiteboards:

On your whiteboards:

On your whiteboards:. Write down the letters of a pair of shapes that are congruent. Write down the letters of a pair of shapes that are similar. On your whiteboards:. Write down the letters of a pair of shapes that are congruent. Write down the letters of a pair of shapes that are similar.

By dmccoy
(2 views)

Lesson Plan – Rectangles

Lesson Plan – Rectangles

Lesson Plan – Rectangles. Starter Activity Complete the ‘Heard the Word’ table and then fold it in half and glue it into your book. Today we are learning. I am starting the lesson on level _____________________. By the end of this lesson I want to be able to _____________________.

By polsen
(23 views)

Perimeter

Perimeter

Perimeter. To find the perimeter we need to add all the measurements from around the outside. 8cm. 8cm. 8cm. 8cm. 8cm + 8cm + 8cm + 8cm = 32cm. 4cm. 4cm. Do we have to measure every side to work out the perimeter?. 5cm. 2cm. 2cm. 5cm. 4cm.

By balicia
(29 views)

Area of Common Shapes

Area of Common Shapes

Area of Common Shapes. 8cm. 2cm. Rectangles. How many squares do you need to fill the rectangle?. Area of a rectangle =. Length x Width. 6cm. 3cm. What is the area of the rectangle?. Triangles. What shape is created when I cut the rectangle in half?. 3cm. 6cm. Triangles.

By philipc
(35 views)


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