3. The points (2, 4), (4,2), (7,1) are the vertices of
a) an equilateral triangle b) a scalene triangle
c) an isosceles triangle d) a right angled triangle​

46.2+112.3

step-by-step explanation:

the reason why your question keeps getting deleted because this is not a school related question : )

i will answer your question though.

i never tried church's

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,