given the following parameters
circle with radius 4cm
sqaure with sides 7cm
triangle with base 8cm and altitude 12.3cm
to get the greatest area of the, we need to look for the area of each of them
therefore,
Area of a circle is Pir^2
pi = 3.142
r = 4
Area = 3.142 x 4^2
= 3.142 x 16
= 50. 27cm
Area of a square = a^2
a which is also the side = 7
therefore,
Area = 7^2
Area = 49cm
Area of a triange = hb/2
h = 12.3cm
b = 8
Area = 12.3 x 8/2
= 98.4/2
Area = 49.2cm^2
so, the areas are
For circle = 50.27
For square = 49
For Triangle = 49.2
therfore the greatest area is that of a circle which is 50.27