63=64=65 ?
64=65?
64=63?
Some students say the area of the following figure is 69, some say that is 70. What do you think?
Source: [url=http://www.foster77.co.uk/50maths]http://www.foster77.co.uk/50maths[/url] (#49: Tricky Triangles)
GeoGebra 互動數學教室 [url=http://www.geogebra.hk/]http://www.geogebra.hk[/url]
Information: 63=64=65 ?
