2010 · Q28
In the figure given above (a circle with diameter AB, chord CD perpendicular to AB at E; AB = 10 cm, AE = 2 cm), what is the length of ED ?
[Figure: circle with diameter AB horizontal, chord CD vertical intersecting AB at E, C above, D below]
Elementary MathematicsGeometry
- A5 cm
- B4 cm
- C√10cm
- D√20cm
Explanation
OE=3, OD=5, so ED=√(25-9)=4 cm.