Since triangle is isosceles, that means that unknown angles are equal. 180-72=108
108:2=54
So you’re answer would be: 54 degrees.
Answer:

Step-by-step explanation:
We want to find a formula for <em>s</em> in terms of <em>a, b, </em>and cos(x).
Let the point where <em>s</em> intersects AB be D.
Notice that <em>s</em> bisects ∠C. Then by the Angle Bisector Theorem:

We can find BD using the Law of Cosines:

Likewise:

From the first equation, cross-multiply:

And square both sides:

Substitute:

Distribute:

Simplify:

Divide both sides by <em>s </em>(<em>s</em> ≠ 0):

Isolate <em>s: </em>

Factor:

Therefore:

Factor:

Simplify. Therefore:

Answer:
Here are the formulas
Cube/Rectangular Prism:
Volume = Length*width*height
Surface area = 2(wl+hl+hw)
Lateral area= Area of vertical faces
Base area = length*width
Regular hexagonal prism:
Volume : (3sqrt3/2)*a^2*h
Surface Area = 6ah+3sqrt(3)a^2
lateral area: 6ah
base area = 3sqrt(3)s^2/2
Triangular prism
Volume: The volume of a triangular prism can be found by multiplying the base times the height.
Surface area: A triangular prism has three rectangular sides and two triangular faces. To find the area of the rectangular sides, use the formula A = lw, where A = area, l = length, and h = height. To find the area of the triangular faces, use the formula A = 1/2bh, where A = area, b = base, and h = height.
Etc.
To find the money you make, take:
x(1 (+ or -) % interest rate) * Time
So in this case, it would be:
3800(1+0.04)(1) = Ans
and
3800(1+0.07)(1) = Ans
Assumably, combining those totals would give you $218. If you take the total of 3800(1+0.04)(1), subtract that from $218.
218 - (3800(1+0.04)(1)) = Your Answer