find m_DCB, given angles A and F are congruent, angles B and E are congruent, and m_CDE=26

To find m_DCB, we can use the fact that the sum of angles in a triangle is 180 degrees.

Given that angles A and F are congruent, we can label their measures as x. Similarly, angles B and E are congruent, and we can label their measures as y.

Since angle C is opposite to angle E in triangle CDE, we can write the equation:
m_CDE + m_CED + m_DCE = 180
Substituting the known value of m_CDE = 26, we have:
26 + m_CED + m_DCE = 180

Now, notice that angle DCE and angle DCB are supplementary angles, which means their measures add up to 180 degrees. Therefore, we can also write the equation:
m_DCE + m_DCB = 180

Now, let's substitute the variables for the given information:
26 + m_CED + m_DCB = 180
And
m_DCE + m_DCB = 180

We need to solve these two equations to find the value of m_DCB. Since we have two equations and two variables, we can solve them simultaneously.

First, we rearrange the second equation for m_DCE:
m_DCE = 180 - m_DCB

Next, substitute this value of m_DCE into the first equation:
26 + m_CED + (180 - m_DCB) = 180

Simplify the equation:
26 + m_CED - m_DCB = 0

Rearrange the terms:
m_CED - m_DCB = -26

Finally, since angles DCE and DCB are alternate interior angles, they are congruent to each other. So we can say:
m_CED = m_DCB

Replacing m_CED in the equation:
m_DCB - m_DCB = -26

Simplifying, we get:
0 = -26

However, this equation is not possible, so there must be an error or inconsistent information given. Please review the given information and ensure its accuracy.