I°) The three sides are known dimensions
| Construct a triangle ABC such as
AB = 5 cm, BC = 4 cm and AC = 2,5 cm |
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 Replay animation |
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Step 1 : It is constructed with the ruler segment [AB] of 5 cm. Step 2 : It takes the compass spacing of 4 cm and plot the arc of a circle with center B Step 3 : It takes the compass spacing of 2.5 cm and plot the arc of a circle with center A. The two arcs intersect at C. |
II°) One side and two angles are known dimensions
| Construct a triangle ABC such as
AB = 6 cm, |
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C
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Step 1 : It is constructed with the ruler segment [AB] of 6 cm. Step 2 : Place the rapporteur on the point A. We measure the angle of 65° and trace the ray from point A. Step 3 : Place the rapporteur on the point B. We measure the angle of 35 ° (note the reading direction) and plot the ray origin B. Step 4 : The two half-lines are intersecting C. |
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