stubbornp wrote:20. In the figure above, line AC represents a seesaw that is touching level ground at point A. If B is the midpoint of AC, how far above the ground is point C?
(1) x = 30
(2) Point B is 5 feet above the ground.
Answer should be C.
Statement I
We dont know the any side of the two triangles.
Statement II
We dont know the measurement of angle x, we only know that angle formed from C to the ground will be 90.
Combining I & II
B to the ground or height = 5
x = 30 degrees
now we have the formation of 30-60-90 right angle triangle
30 - 1
60 - sqrt3
90 - 2
30 degree angle = 5 feet
We can easily find AB
AB + BC = AC
we have another formation of 30-60-90 because from point C to the ground angle will be 90 degree.
We already have the length of AB, therefore we can find the height.
Sufficient.
Hence C.
OA?
