Answer:
884cm^2
Step-by-step explanation:
top triangle area=21*24/2=252
central triangle area=16*24/2=192
left n right triangle area (each)=22*20/2=220
total area of wood needed=252+192+220+220
=884cm^2
Answer:
y=35+x+15x/100. since x is the money earn so 15percent of x
35x – 13 x = x – 1
⇒ 22 x = x - 1
⇒ 22x - x = -1
⇒ 21x = -1
⇒ x = -1/21
Thus,the value of x is -1/21
Answer:
x= -3 or x= -4
Step-by-step explanation:
Answer:
The length of b is
.
Step by step explanation:
Given information: In ΔABC, ∠A =∠C, ∠B = ß (where ß is an acute angle), and BC = x.
Since two angles are same therefore triangle ABC is an isosceles triangle and side AB and BC are congruent.
![AB=BC=x](https://tex.z-dn.net/?f=AB%3DBC%3Dx)
According to Law of cosine
![b^2=a^2+c^2-2ac\cos B](https://tex.z-dn.net/?f=b%5E2%3Da%5E2%2Bc%5E2-2ac%5Ccos%20B)
![b^2=x^2+x^2-2(x)(x)\cos \beta](https://tex.z-dn.net/?f=b%5E2%3Dx%5E2%2Bx%5E2-2%28x%29%28x%29%5Ccos%20%5Cbeta)
![b^2=2x^2-2x^2\cos \beta](https://tex.z-dn.net/?f=b%5E2%3D2x%5E2-2x%5E2%5Ccos%20%5Cbeta)
![b^2=2x^2(1-\cos \beta)](https://tex.z-dn.net/?f=b%5E2%3D2x%5E2%281-%5Ccos%20%5Cbeta%29)
![\sqrt{2x^2(1-cos\beta)}](https://tex.z-dn.net/?f=%5Csqrt%7B2x%5E2%281-cos%5Cbeta%29%7D)
Therefore the length of b is
.