![9.6 Solving Right Triangles](http://s1.studyres.com/store/data/008576774_1-908cdde5a794713b2fcfa4d5bbac1df1-300x300.png)
I can statements for proofs unit (2)
... 12) Determine if you have enough information to declare the two triangles congruent. If you have enough information, explain how you know then name the congruent triangles. If you do not have enough information, explain what is missing. a) b) ...
... 12) Determine if you have enough information to declare the two triangles congruent. If you have enough information, explain how you know then name the congruent triangles. If you do not have enough information, explain what is missing. a) b) ...
Rule of marteloio
![](https://en.wikipedia.org/wiki/Special:FilePath/Tondo_e_quadro_(Bianco,_1436).jpg?width=300)
The rule of marteloio is a medieval technique of navigational computation that uses compass direction, distance and a simple trigonometric table known as the toleta de marteloio. The rule told mariners how to plot the traverse between two different navigation courses by means of resolving triangles with the help of the Toleta and basic arithmetic.Those uncomfortable with manipulating numbers could resort to the visual tondo e quadro (circle-and-square) and achieve their answer with dividers. The rule of marteloio was commonly used by Mediterranean navigators during the 14th and 15th centuries, before the development of astronomical navigation.