Question

the diameter of circle symbol z is 5 in. what is the area in terms of pi ?

Answer 1

what's the formula to find AREA of a circle ??

Answer 2

a=pi radius squared

Answer 3

yes right
and diameter is half of radius
you can use this formula to find radius \[\huge\rm r=\frac{ d }{ 2 }\]

Answer 4

so 2.5 in squared ?

Answer 5

yes right take square of 2.5

Answer 6

huh?

Answer 7

well radius is 2.5 right ?

Answer 8

yes it is

Answer 9

\[\huge\rm A =\pi r^2\]

Answer 10

substitute r for 2.5 ^^

Answer 11

ok i get 6.25

Answer 12

right

Answer 13

and we have to write it interms of pi

Answer 14

ok so 6.25pi in squared

Answer 15

can you help me with another one @Nnesha

Answer 16

i willlll try not sure:=)

Answer 17

can you help @DanJS

Answer 18

ok

Answer 19

this is the question

Answer 20

the point C(x,y) is 3/4 the way from A to B along a line...

youc an set up 2 equations involving x and y and solve

or...

Answer 21

since it is a line with a constant slope , the x and y components of that form a right triangle

realizing that the relation between the lengths of each side by the pythagorean theorem
c^2 = a^2 + b^2

if you shrink the hypotenuse down by 3/4 you have to do that to the other terms too

Answer 22

(3/4)c^2 = (3/4)*a^2 + (3/4)*b^2

Answer 23

ok

Answer 24

so you can just look and see the change in x coordinate, and find 3/4 that, and add that to the start value

Answer 25

Same for y coordinate

Answer 26

ok so how do i this then ?

Answer 27

The length in the x direction from A to B is 16, 3/4 of that is 12

start at A and move 12 in the X direction, that is the x coordinate of C

Answer 28

do the same for the Y direction

Answer 29

so 2,0

Answer 30

thats what i got

Answer 31

yeah, sounds good

Answer 32

It is just basically shrinking a right triangle by 25% then seeing where it lies on the coordinates

Answer 33

so i got that right ?

Answer 34

or you can do it by setting up 2 equations involving x and y in the point N, then solving for the x and y

Answer 35

Distance AC = 3/4 * Distance AB

and

equation of the line through AB

Answer 36

ok cool but am i right ?

Answer 37

yes, you can check by just calculating the distances AB and AC and check if they are correct