a. (-35/37, 12/37)
b. (16/53, 37/53)
c. (119/74, -45/74)
d. (-49/51, -2/51)
b. (16/53, 37/53)
c. (119/74, -45/74)
d. (-49/51, -2/51)
-
The answer is a)
A unit circle is defined as a circle of radius 1 and its origin/centre at (0,0).
as the radius is 1, the length of a line between the origin and any point on the circle will therefore be 1.
Use pythagoras on each of the coordinates above to calculate the length of the line. The point at a) is the only point that gives you a length of 1.
A unit circle is defined as a circle of radius 1 and its origin/centre at (0,0).
as the radius is 1, the length of a line between the origin and any point on the circle will therefore be 1.
Use pythagoras on each of the coordinates above to calculate the length of the line. The point at a) is the only point that gives you a length of 1.
-
four coordinates (x,y)
To be on the unit circle x^2 + y^2 = 1. (by pythagoras)
For each coordinate substitute the values of x and y in the equation and see which one is correct.
To be on the unit circle x^2 + y^2 = 1. (by pythagoras)
For each coordinate substitute the values of x and y in the equation and see which one is correct.