Answer:
C
Step-by-step explanation:
Each of the triangles are equal in base length, height, and area<span>. Remember the formula for the </span>area<span> of a triangle. The </span>area<span> of any triangle is 1/2 times the length of the base (which, in the </span>polygon<span>, is the length of a side) multiplied by the height (which is the same as the apothem in </span>regular polygon<span>).
</span>
5x-5=4x+10
x=15
75-5=70
180-70=110
6y-4=110
6y=114
y=19
8 x 1.25 = 10
or you could do 8 x 0.25 = 2
8 + 2 = 10