68. Relative Aperture. The relative aperture, or f-stop, of a 23.5-mm lens is directly proportional
to the focal length F of the lens. If a lens with a
150-mm focal length has an f-stop of 6.3, find the
f-stop of a 23.5-mm lens with a focal length of
80 mm.

jml angle lkj & angle mj = lm

answer: it actually depends on which is the independent variable and which is the dependent variable. let us say we're looking at a linear equation. y=2x+3. we theoretically could switch the equation to be x=(y-3)/2 and it would be the same line. so either a causes b or it can be that b causes a. so technically the answer is false

step-by-step explanation:

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)