The answer to this is 2.
There are a number of proofs to this. Here, we use Euclidean geometry with trigonometry. If we let the center of the circle to be O.
Then, we have the following equations for the angles
CEO = OED = 90
Since, CO = OD because they're radii of the circle, then
ΔCOD is an isosceles triangle and
OCE = ODE
CE + DE = CD
dividing the whole equation by DE
CE/DE + 1 = CD/DE
Using trigonometric functions:
CE = OC cos OCE and
DE = OD cos ODE
Substituting.
OC cos OCE / OD cos ODE + 1 = CD/DE
Since, OCE = ODE,
cos OCE = cos ODE
The equation would be reduced to:
1 + 1 = CD/DE
CD/DE =2
1 litre is left. 1.2 litres = 1200 ml so 1200-200=1000, or 1l
The intersection of a line and a plane is a point that lies both on the line and the plane F. This is illustrated in the figure below. You can see that the point of intersection is P. What this intersection means is that the line passes through the plane F.
So, the right answer is b) 1
21-4 is 17. you now have 17 apples
