PLEASE HELP ASAP FIND THE LENGTH
1 answer:
Triangle ABC:
<ABC=90°
<ACB=y
Triangle CDE:
<CDE=90°
<DCE=y
The two triangles have two congruent angles, then they are similars, and theirs sides must be proportionals:
Adjacent angle to y / Hypotenuse
Triangle CDE Triangle ABC
CD/CE = BC/AC
Replacing the values:
x/7=(20-x)/21
Solving for x. Cross multiplication:
(21)(x)=(7)(20-x)
21x=140-7x
21x+7x=140-7x+7x
28x=140
28x/28=140/28
x=5
Length of CD = x = 5
Answer: The length of CD is 5
Answer: 5
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Hello,
The correct answer is B) 280 in²
= 10( 2 × 9 + 10 )
= 10 (2 × 9 = 18 + 10 = 28)
= 10 × 28 = 280
= 280
Answer: 280 in²
In other words.....
= 10(2*9+10)
= 10(18+10)
= 10*28
= 280
Answer: 280 in²
Hope this helps!!!! (:
If n = $3 then plug it in
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