The perimeter of a right triangle is 25 meters, and the area is 20 square meters. The lengths of the sides are each multiplied b
y 3. What is the area of the new triangle? Please help me, not by just giving me the answer, but by explaining how I solve this so I can solve it on my own. Thanks :)
The Heron's formula for calculating area is S=√p(p-a)(p-b)(p-c) where p is perimiter divided into 2 p=(a+b+c)/2 Then length of each side is multiplyed into 3 New p is bigger than old by three times p=3(a+b+c)/2 S=√3p*3(p-a)*3(p-b)*3(p-c)=9√p(p-a)(p-b)(p-c) Area of new triangle are bigger than area of old triangle by 9 times. S=20*9=180 square meters Area of new triangle is 180 square meters.
