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the angle BAC is equal to the angle ADB, for each is right,
and
the angle at B is common to the two triangles ABC and ABD,
therefore
the remaining angle ACB is equal to the remaining angle BAD. [I.32]
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T H E E L E M E N T S |
Book VI Proposition 8 | |
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For, since the angle BAC is equal to the angle ADB, for each is right, and the angle at B is common to the two triangles ABC and ABD, therefore the remaining angle ACB is equal to the remaining angle BAD. [I.32] |
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