Find the area of a triangle with legs that are 9mm 6mm and 12mm

Here we are given the three sides of the triangle.

So we have Heron's formula to find its area.

Heron's formula is given by :

where A, B and C are sides of triangle and S is semi perimeter which is given by,

plugging values of A, B and C to find S

S=13.5

Now plugging values of A, B , C and S in Heron's formula

A=26.14 mm²

Area of triangle is 26.14 mm².

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

i would say b) is your answer

sorry if im wrong

step-by-step explanation: