Two planes intersect at a Line.
Learn this...it helps
HOY -- horizontal line, 0 slope, represented by y = a number
VUX -- vertical line, undefined slope, represented by x = a number.
so ur equation y = -1....this is a horizontal line with a 0 slope
In slope intercept form it is : y = 0x - 1 <==....ur slope is 0 and ur y int is -1
I do not understand what to do , more explicitly sorry :(
Answer:
The answer should be: r ≈ 8.21
We can see that the diameter is 5 cm. Radius is simply half of the diameter.
5/2=2.5
The radius is 2.5 cm.
