What does the measure of c equal

As shown in picture:

BC = BA => triangle ABC is isosceles => angle BCA = angle BAC

DC = DA => triangle ADC is isosceles => angle DCA = angle DAC

=> C = BCA + DCA = BAC + DAC = A

Other wise, the sum of 4 internal angles of a quadrilateral is equal to 360 deg.

=> C + A = 360 - 100 - 45 = 215

=> C = A = 215/2 = 107.5 deg

Hope this helps!

:)

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

pi x^2

step-by-step explanation:

pi times x squared