T H E E L E M E N T S |
Book I Proposition 22 | |
For, since the point F is the center of the circle DKD, FK is equal to FD. But A is equal to FD; therefore FK is equal to A. Again, since the point G is the center of the circle HKH, GK is equal to GH. But C is equal to GH; therefore GK is equal to C. And FG is also equal to B; therefore the three straingt lines KF, FG, GK are equal to the three straight lines A, B, C. |
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