Question

for exercises 16 and 17, mark each figure with all the given 16. $mangle adb = 90^{circ}, ad = bd, angle dabcongangle dba$

Explanation:

Step1: Indicate right - angle

Since $m\angle ADB = 90^{\circ}$, use a square symbol at $\angle ADB$.

Step2: Indicate equal segments

As $AD = BD$, mark $AD$ and $BD$ with one tick mark each.

Step3: Indicate congruent angles

Because $\angle DAB\cong\angle DBA$, mark them with the same arc symbol.

Answer:

1. Mark $\angle ADB$ with a right - angle symbol (square) at point $D$.
2. Mark segments $AD$ and $BD$ with one tick mark each to show $AD = BD$.
3. Mark $\angle DAB$ and $\angle DBA$ with the same arc symbol to show $\angle DAB\cong\angle DBA$.