X value is going up and y value is moving up and down. So, it`s look like a quadratic function. y intercept is 12 and x intercept is 2 and 6. and vertex is (4,-4). than f(x)= a(x-4)^2+4. and put (0,12). and 16a+4=12. a=1/2. f(x)=1/2x^2-4x+12 or 1/2(x-4)^2+12
Since there are as many of these triangles as the polygon has sides (eight for an octagon), you have to multiply the area of this triangle by the number of sides. You will obtain the total area of the octagon: area of octagon = 8 * base * height / 2 = perimeter * apothem / 2 .
i hope this helped you :)
Answer:
k=-13
Step-by-step explanation:
Answer:
642 mm or 64.2 cm
Step-by-step explanation:
67cm-28mm
We need the same units
67 cm * 10 = 670 mm
670 mm - 28 mm
642 mm
We can convert back to cm by dividing by 10
64.2 cm
