Tamiko is planning a stone wall shaped like a triangle, with vertices (-1, -2), (2, 2), and (-2, 2) on a coordinate grid. She plans to add a second wall, in the same shape, enclosing the first wall, with the origin as the center of dilation. The vertices of the second wall are (-3, -6), (6, 6), and (-6, 6). a. What scale factor did Tamiko use for the second wall? b. Are the two walls similar? Explain

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.