How do you find the area of this triangle?

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The answer is 12.2 but I have no idea how to get that. Help???

1 Answer
Jim G.
Jun 9, 2017

#"area "~~12.3" square units"#

Explanation:

#"calculate the area using "color(blue)"Heron's formula"#

#"this is a two step process"#

#"label the sides a, b and c"#

#• " calculate the semi-perimeter (s)"#

#s=(a+b+c)/2#

#"let a = b = 5 and c = 7.6"#

#rArrs=(5+5+7.6)/2=17.6/2=8.8#

#"calculate the area (A) using"#

#• A=sqrt(s(s-a)(s-b)(s-c))#

#rArrA=sqrt(8.8xx3.8xx3.8xx1.2)#

#color(white)(rArrA)=sqrt(152.4864)~~12.3#

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