Answer:
-5
Step-by-step explanation:
Answer:
A) B is greater
B) when C = 21, A = 5 and B = 15
C) A must be 0, 5, or 12 for C to be greater than B
Step-by-step explanation:
A) when a = -3, c = -20 and b = 4(-3)-5 so B = -17
B) when c = 21, a = 5 and b = 4(5)-5 so B = 15
C) C is greater than B when a = 0, 5, and 12
when a = 0, b = 4(0)-5 or -5
when a = 5, b = 4(5)-5 or 15
when a = 12, b = 4(12)-5 or 43
i have no ideaaaaa HAHAHAHA
Answer:
![60cm^{2}](https://tex.z-dn.net/?f=60cm%5E%7B2%7D)
Step-by-step explanation:
so first we need to find the height so by splitting the isosceles triangle into two right-angled triangles and then applying Pythagoras' Theorem to one of them.
![h^{2} =13^{2} -5^{2}](https://tex.z-dn.net/?f=h%5E%7B2%7D%20%3D13%5E%7B2%7D%20-5%5E%7B2%7D)
![h^{2} =169-25](https://tex.z-dn.net/?f=h%5E%7B2%7D%20%3D169-25)
![h^{2} =144](https://tex.z-dn.net/?f=h%5E%7B2%7D%20%3D144)
![h=\sqrt{144}](https://tex.z-dn.net/?f=h%3D%5Csqrt%7B144%7D)
![h=12](https://tex.z-dn.net/?f=h%3D12)
We now know the height of the triangle and can use this to go back and find the area of the isosceles triangle.
area of triangle =
x base x height
area of triangle =
x 10 x 12
area of triangle = 60