《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：
6 Strategies To Grow Your Facebook Page　 5 Sure Shot Content Marketing Trends to Follow　 7 Ways for Your Underdog Blog to Beat the Competition　 Darkstore Aims to be Less Invasive Alternative to Tech Giants ac　 5 Free Blogging Apps You Need On Your IPhone Right Now　 The Exact Amount that You Must Spend on a Great Blog Is…　 How to Make Videos Search Engines Love　 5 Thoughts For Investing In Your Freelancing Career In 2017　 How YouTube Can Work in Tandem With Your Blog　 Essena O’Neill Quits Social Media