Angle ABC and angle CBD or a complementary what is the value of X

Find the arc length parameter along the given curve from the point where tequals=0 by evaluating the integral s(t)equals=integral from 0 to t startabsolutevalue bold v left parenthesis tau right parenthesis endabsolutevalue d tau∫0tv(τ) dτ. then find the length of the indicated portion of the curve r(t)equals=1010cosine tcost iplus+1010sine tsint jplus+88t k, where 0less than or equals≤tless than or equals≤startfraction pi over 3 endfraction π 3.

Which value of c would make he following expression completely factored? 8x+cy

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles