whats the figure? I need the background knowledge
1, 4, 13, 40, 121, 364, 1,093, 3,280, 9,841, 29,524, 88,573.
Hoped this helped :)
Answer:
25x^2 -1
Step-by-step explanation:
If you multiply parentheses:
(5x*5x) + (5x*-1) + (1*5x) + (1*-1)
25x^2 - 5x + 5x -1
25x^2 -1
A simpler way is to memorize this formula
(Square1 - square2)= (sqrt of square1- sqrt of square2)*(sqrt of square1 + sqrt of sqaure2)
We know that
circumference=2*pi*r
for r=5 cm
circumference=2*pi*5-----> 31.4 cm
if 360° (full circle) has a length of------------> 31.4 cm
225°-----------------------------> X
X=225*31.4/360-----> X=19.625-----> x=19.63 cm
the answer is
19.3 cm