levidenim08
27.06.2020 •
Mathematics
What is the missing reason for the 3rd step in the proof below?
Given: AX || CY, BX || DY, AB || CD
A ABX - ACDY
Prove: Slope of AB - slope of CD
Statement
Reason
1. Given
1. AX ||DY, BX ||DY AB || CD
A ABD - A DBC
2 AX ВХ
GYDY
2. Definition of similar triangles: Corresponding
sides of similar triangles are proportional
3. AX. DY - BX.CY
3.
DY. ex: CY
1 AX
4 v - slope of cookie
slope of AB
4. Definition of slope
5. Slope of AB - slope of CD
5. Substitution
Solved
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Ответ:
a = 32
Step-by-step explanation:
This is a right triangle and the square value of hypotenuse is equal to sum of square value of other two side lengths
68^2 = 60^2 + a^2
4624 = 3600 + a^2
4624 - 3600 = a^2
1024 = a^2 find the root for both sides
32 = a