brandyjune9546
02.12.2020 •
Mathematics
Determine whether the relation is a function
1.
-3
5
True
False
Solved
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Ответ:
Length of CD = 9.8 units
Step-by-step explanation:
Given AB || CD
angles BAC = ACD ................alternate interior angles
Angles CBA = CAD = 90 (given)
=>
Triangles ABC and CAD are similar (AAA)
AB / AC = CA / CD ................Similar triangles have corresponding sides proportional
5 / 7 = 7 / CD
CD = 7*7/5 = 49/5 = 9.8
=