BAZIC C/R 100 Count Chevron Composition Book, Case of 48 (5493-48)
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number 48 in the figure below ABCD is a square and e f g and h are the midpoints of its sides if a B equals 12 what is the perimeter of e f g h we first have to start by labeling our figure it tells us ABCD is a square and that each of these points e f g and h are the midpoints of the sides making for congruent right triangles which are isosceles now remember isosceles right triangles are 45 45 90 right triangles so a B equals 12 that means this equals 6 this equals 6 and 6 is all around if this is 6 and this is 6 that means this side eh is going to be 6 rad to which is the same as each of these four sides now if you don't know that you're going to have to solve the Pythagorean theorem 45 45 90 triangles are very handy to have memorized in this case solving by the Pythagorean theorem I get 6 squared plus 6 squared equals C squared or in this case x squared the square root of 72 is X oth
