《平面图形的面积》由周洁婴老师主讲，系统地讲述了长方形、正方形、平行四边形、三角形、梯形、菱形及不规则平面图形的面积的计算方法（不含圆形、半圆、扇形等曲线图形），是难得的平面图形面积视频教程。

推荐阅读：
How to Convert Integer to the Sum of Two No-Zero Integers?　 Algorithm to Generate the Spiral Matrix in Clock-wise Order　 How to Remove the Duplicates from Sorted List (Leaving Only Dist　 How to Sort a Linked List by Converting to Array/Vector?　 Know The Effective and Smart SEO Reporting Tool You Must Use　 Pro Content Marketing Tips You Can Implement NOW　 8 WordPress Plugins for Better User Experience　 6 Eye-Opening Tips for Measuring and Improving the Impact of You　 Should a Professional Blog Be Funny?　 How to Perform a Meaningful Content Audit of Your Blog Section