 |
| ||
| |||
|
| Math Central | Quandaries & Queries |
|
Question from arun, a student: a semi circle is drawn with ab as diameter from p a point on ab a line perpendicular to ab is drawn meeting circumference of semi circle at c, ac = 2cm, cd = 6cm find are of the semi circle? |
Hi Arun,
I drew a diagram of the situation you described.
Since the line segment ab is a diagonal of a circle and c is on the circumference, the angle bca is a right angle. You know the lengths of bc and ca so you can use Pythagoras theorem to find the length of the diagonal ab.
Penny
| ||
| ||
| ||
 |
 |
|
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.