XYZ and ABC are similar triangles. Given the dimensions shown in the diagram, what is the area of triangle ABC ? Express the ans
1 answer:
We know that
scale factor=XY/AB--------> 6/3-----> 2
area of a triangle=b*h/2
in the triangle XYZ
b=8.4 units
h=3.36 units
the area of triangle XYZ=8.4*3.36/2-----> 14.112 units²
in the triangle ABC
b=4.2 units
h=3.36/2-----> 1.68 units (remember scale factor)
the area of triangle ABC=4.2*1.68/2-----> 3.528 units²
the answer is
the area of triangle ABC is 3.528 units²
<span>alternative method
</span>
area triangle XYZ=area triangle ABC*[scale factor]²
area triangle ABC=area triangle XYZ/[scale factor]²----> 14.112/2²---> 3.528 units²
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