A point P moves such that it is equidistant from Points Q and R. Find QR when PR = 8cm and angle PRQ = 30°
-
A.
4√3cm -
B.
8cm -
C.
8√3cm -
D.
4cm
Correct Answer: Option A
Explanation
Hint: Make a sketch of the moving points such that the hypotenuse is 8cm and the adjacent x cm.
Cos 30 = x/8
x = 8 cos 30 = 4√3cm