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theamandawhite
28.10.2021 •
Mathematics
Using the GCF you found in Part B, rewrite 35 + 63 as two factors. One factor is the GCF and the other is the sum of two numbers that do not have a common factor. Show your work.
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Ответ:
11.71 cm 2
Step-by-step explanation:
Find the area of quadrilateral ABCD
∴ Area of quadrilateral =21d(h1+h2)=21×12×11=6×11=66 cm2
This means that the best equation to use is
equation of the diagonal = d then d* (h1+h2)
We have measure d * (h1+h2) = area
This is how we find the diagonals = a * c + b* d = 2*5+ 3*-5 = -5
We find -5 by looking for the sides of the quadrilateral and its diagonals. If you multiply the lengths of each pair of opposite sides, the sum of these products equals the product of the diagonals
= -5d ( h1 +h2) = -5d ( -0.853 x 2) = -5 * -2.342 = 11.71
Formulas: For angles measuring 59.1 for a, 71.9 for γ , 161 for β
e = √ a² + b² - 2ab * cos( β )
f = √ b² + c² - 2bc * cos( γ )
When we input we can prove with cos ( β angle)
e = √ 5² + 2² - (2 * 5 * 2) cos ( 161 ) = 3.4728
f = √ 5² + 3² - 2* 5 * 3 * cos( 71.9 ) = 5.25
then;
γ1 = arccos( (b² + e² - a²) / 2be )
γ2 = γ - γ1
d = √ c² + e² - 2ce * cos( γ2 )
then;
α = arccos( (a² + d² - f²) / 2ad )
δ = 360° - α - β - γ
p = a + b + c + d
A = √ 4e²f² - ( b² + d² - a² - c² )² / 4
A = √ 4e²f² - ( b² + d² - a² - c² )² / 4
A = 11.71
vertices a = 5 b= 2 c= 3 d= -5
where e = √3.4728 and f = √5.25
= (2^2 + 5^2 - 5^2 - 3^2 ) = 4+25+25 -9 = (-5^2- √ 4e²f²) = -25 - 18.2322801025= (2025/43.2322801025 = 46.84 /4 = 11.71