What is the measure of angle b if angle bcd is 100

The triangle is isosceles so the angle measurements of angle A and C is 80 degrees. So:

180 - (80 + 80)= 20

20 degrees

26 is 33.33% of 78

step-by-step explanation:

26 is what percent of 78?

26 is p% of 78

equation: y = p% * x

solving our equation for p

p% = y/x

p% = 26/78

p = 0.3333

convert decimal to percent:

p% = 0.3333 * 100 = 33.33%