Question

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

Explanation:

Step1: Mark right - angle

Since \(m\angle ADB = 90^{\circ}\), mark a small square at \(\angle ADB\) to indicate a right - angle.

Step2: Mark equal sides

As \(AD = BD\), mark one short dash on \(AD\) and one short dash on \(BD\) to show they are equal.

Step3: Mark congruent angles

Because \(\angle DAB\cong\angle DBA\), mark one arc on \(\angle DAB\) and one arc on \(\angle DBA\) to show they are congruent.

Answer:

Mark a small square at \(\angle ADB\), one short dash on \(AD\) and one short dash on \(BD\), and one arc on \(\angle DAB\) and one arc on \(\angle DBA\).