Question
Erika has a square piece of paper CDEF of side 63 m. She cut along the dotted lines shown in Figure 1 to get one small square of area 81 m2 and 8 identical right-angled triangles. Triangle GHJ in Figure 2 is one such triangle. Find the length of GJ.
2 m

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Erika has a square piece of paper CDEF of side 63 m. She cut along the dotted lines shown in Figure 1 to get one small square of area 81 m2 and 8 identical right-angled triangles. Triangle GHJ in Figure 2 is one such triangle. Find the length of GJ.