Mr. Eric
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© 2020 - 2023 Mr. Eric
© 2020 - 2023 Mr. Eric
If Two right lines (AB, CD) intersect one another, the opposite angles are equal (CEA=DEB, and BEC=AED)
If at a point (B) in a right line (BA) two other right lines (CB, BD) on opposite sides make the adjacent angles (CBA, ABD) together equal to two right angles, these two right lines form one continuous line.
The adjacent angles (ABC, ABD) which one right lines (AB) standing on another (CD) makes with it are either both right angles, or their sum is equal to two right angles.
To draw a perpendicular to a given indefinite right line (AB) from a given point (C) without it.
From a given point (C) in a given right line (AB) to draw a right line perpendicular to the given line.
To bisect a given finite right line (AB).
To bisect a given rectilineal angle (BAC).
If two triangles (ABC, DEF) have two sides (AB, AC) of one respectively equal to two sides…
If two triangles (ACB, ADB) on the same base (AB) and on the same side of it have one …
If two angles (B, C) of a triangle be equal, the sides (AC, AB) opposite to them are also equal.
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