Here is the work and the answer (D=7
A leaf fell from a tree branch. The path it followed is shown in the diagram below.
1 answer:
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Answer:
? = 1 (assuming right-angled triangle)
Step-by-step explanation:
This is an application of Pythagoras' Theorem, but rearranged:
is, of course, 10, so 10 - 9 = 1, and
.