Your notebook on geometry sustained the infinite number of drawings. The time is time to add to it one more drawing - a triangle. A figure this capricious and in order that to construct it, it is necessary to know some subtleties. Try to construct a triangle on two parties and a corner.
It is required to you
- - pencil,
- - ruler,
- - protractor,
- - notebook or a leaf in a cage
Instruction
1. Let's assume, to us it is necessary to construct triangle ABC. Two parties are given - AB is equal to 7 cm, AC is equal to 5 cm; and BAC corner equal to 45 degrees. Put A end to a notebook. From A point by means of a ruler lay off 5 cm and put the end of C. So, at you the party of AC of a triangle ABC turned out.
2. Take the party of AC as a basis and on it by means of a protractor construct a corner in 45 degrees. Put the intermediate end of Q. Then connect a point of A and an intermediate point of Q.
3. Apply a ruler to a piece of AQ and lay off A 7 cm from a point. Put B end. At you the second party of AB of a triangle ABC turned out. The corner between the parties of AB and AC turned out to equal 45 degrees.
4. Connect points of B and C. The triangle of ABC with the set parties and a corner is ready. Circle it.