Answer:
Length of DE is : 18√2 units
Step-by-step explanation:
The length of a side of a triangle is 36.
To calculate : The length of the segment DE
Now, the two parts of triangle have equal area ∴ Area(ADE) = Area(BDEC)
![\implies Area(ADE)=\frac{1}{2}\times Area(ABC) \\\\\implies \frac{Ar(ADE)}{Ar(ABC)}=\frac{1}{2}](https://tex.z-dn.net/?f=%5Cimplies%20Area%28ADE%29%3D%5Cfrac%7B1%7D%7B2%7D%5Ctimes%20Area%28ABC%29%20%5C%5C%5C%5C%5Cimplies%20%5Cfrac%7BAr%28ADE%29%7D%7BAr%28ABC%29%7D%3D%5Cfrac%7B1%7D%7B2%7D)
In ΔABE and ΔABC,
∠A = ∠A (Common angles)
∠ABE = ∠ABC (Corresponding angles are always equal)
By AA postulate of similarity of triangles, ΔABE ~ ΔABC.
Hence by area side proportionality theorem
![\frac{Ar(ADE)}{Ar(ABC)}=(\frac{DE}{BC})^2\\\\\implies \frac{1}{2}=\frac{DE^2}{36^2}\\\\\implies DE^2=\frac{36^2}{2}\\\\\bf\implies DE=18\sqrt{2}\textbf{ units}](https://tex.z-dn.net/?f=%5Cfrac%7BAr%28ADE%29%7D%7BAr%28ABC%29%7D%3D%28%5Cfrac%7BDE%7D%7BBC%7D%29%5E2%5C%5C%5C%5C%5Cimplies%20%5Cfrac%7B1%7D%7B2%7D%3D%5Cfrac%7BDE%5E2%7D%7B36%5E2%7D%5C%5C%5C%5C%5Cimplies%20DE%5E2%3D%5Cfrac%7B36%5E2%7D%7B2%7D%5C%5C%5C%5C%5Cbf%5Cimplies%20DE%3D18%5Csqrt%7B2%7D%5Ctextbf%7B%20units%7D)
Hence, length of DE is 18√2 units
Answer:
the answer would be 26 units squared, hopefully this helps :)
Step-by-step explanation:
For question number 9, the next two numbers are 768 and -3072. Not sure if you need help with the other problems but could answer them as well :)
We know, that when d₁ and d₂ are diagonals, then area of rhombus is:
![A = \frac{1}{2}\cdot d_1\cdot d_2](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B1%7D%7B2%7D%5Ccdot%20d_1%5Ccdot%20d_2)
In this case we have:
![d_1 = |7-(-5)|=|7+5|=|12|=\boxed{12}\\\\d_2 = |0-(-4)|=|0+4|=|4|=\boxed{4}](https://tex.z-dn.net/?f=d_1%20%3D%20%7C7-%28-5%29%7C%3D%7C7%2B5%7C%3D%7C12%7C%3D%5Cboxed%7B12%7D%5C%5C%5C%5Cd_2%20%3D%20%7C0-%28-4%29%7C%3D%7C0%2B4%7C%3D%7C4%7C%3D%5Cboxed%7B4%7D)
so the area:
Maybe it's A. exponential