The Massachusetts Teacher, Volumen12Mass. Teachers' Association, 1859 |
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Página 108
... angles equal to three angles , whose sum we have already proved equal to two right angles . Produce any two sides so as to form a verticle angle , and draw a line through the vertex of this angle , parallel to the third side . Since ...
... angles equal to three angles , whose sum we have already proved equal to two right angles . Produce any two sides so as to form a verticle angle , and draw a line through the vertex of this angle , parallel to the third side . Since ...
Página 109
... angles ( P. 1 ) ; FBA and BAC are equal to two right angles , being interior angles on the same side of the parallels ; hence , ( Ax . 1 , ) GBF + FBA = FBA + BAC ; taking FBA from each , ( Ax . 3 , ) GBF BAC . I can prove the ...
... angles ( P. 1 ) ; FBA and BAC are equal to two right angles , being interior angles on the same side of the parallels ; hence , ( Ax . 1 , ) GBF + FBA = FBA + BAC ; taking FBA from each , ( Ax . 3 , ) GBF BAC . I can prove the ...
Página 110
... angle . The sum of the consecutive angles formed about a given point , is equal to four right angles . Three of these angles are equal to the three angles of the triangle , because they have their sides parallel and lying in the same ...
... angle . The sum of the consecutive angles formed about a given point , is equal to four right angles . Three of these angles are equal to the three angles of the triangle , because they have their sides parallel and lying in the same ...
Contenido
A Serious Thought for Boston Teachers | 116 |
Botany in Primary Schools | 138 |
Charitable Institutions of the State | 151 |
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