You can find the 7 base units, their current definitions,and proposed redefinitions, in the Wikipedia article "SI base unit".
There are 7 base SI units and all other are defined using these 7 base units. See the related question below:[http://wiki.answers.com/Q/What_are_all_the_SI_unitsWhat are all SI units?]
Formula = base * height / 2 7 * 7 = 49. 49/2 = 24.5 24.5 units squared.
31.5 units squared.31.5
31.5 units
(7*x)/2 = area in square units
44
37 * * * * * No. Total surface area = Lateral area + 2*base area = 10*3 + 2*7 = 30 + 14 = 44 sq units.
The area of triangle is : 31.5
There are 7 base SI units and all other are defined using these 7 base units. See the related question below:[http://wiki.answers.com/Q/What_are_all_the_SI_unitsWhat are all SI units?]
Lateral area = 10*3 = 30 sq units Total area = Lateral area + 2*Base area [top and bottom] = 30+2*7 = 44 sq units
The SI has 7 base units: http://en.wikipedia.org/wiki/SI_base_unit Also, the SI has tens of derived units - perhaps hundreds of them, since you can combine the base units in many ways. Those units are ultimately derived from the 7 base units. For example, units for area, volume, speed, force, energy, pressure, electric charge, voltage, and many more, are derived from some of the base units. http://en.wikipedia.org/wiki/SI_derived_unit
The SI has 7 base units. These units can be combined in an almost unlimited way to form other (derived) units. The Wikipedia article on "SI derived units" lists some examples.