Which explanation justifies how the area of a sector of a circle is derived? determine the percent of the sector of the circle divided by the degrees in a circle. then find the number of triangles within a circle. divide the two numbers and multiply by the area of the circle. the sector of a circle is a fractional part of the circle. determine the fraction of the circle that the sector represents. multiply this fraction by the area of the entire circle. the sector of a circle represents a part of a whole circle. determine how many sections of the sectors will fit in the circle. multiply this number by 180 and then multiply it by the area of the circle. find how many sector pieces fit in a circle. divide this number by the total degrees in a circle. then multiply the quotient by the diameter of the circle.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.