In the figure above cd is the perpendicular bisector of ab. three students explained how they proved adc is congruent to bdcwho's explanation is incorrect? ?

All three explanations are correct.

Step-by-step explanation:

In the given triangles CD is perpendicular bisector of AB

So we have

AC= BC  ( C is on perpendicular bisector of AB and hence C is equidistant              from A and B)

∠ADC =∠BDC =90°                 ( CD ⊥ AB)

CD = CD   ( reflexive property)

AD = BD  (  CD is bisects AB)

We can use HL theorem or  SSS or SAS  to prove ΔADC≅ΔBDC

Hence all the three explanations are correct.

the answer to the question is a

step-by-step explanation:

it has the same slope and the same y-intercept.

y + 11 = -7/9(x - 18)

y + 11 =-7/9x + 14

b

y = -7/9x + 3

y-intercept (0, 3)

"a" determine whether sage found the correct quotient. show your work

step-by-step explanation: