Try to draw a quadrilateral where three of the angles are $120°$. What happens? Why?

Make an accurate drawing of this quadrilateral.

You are given the size of every side and angle. Did you need all this information to draw the quadrilateral? What is the least number of measurements you need to draw the quadrilateral accurately?

Describe the least set of measurements you need in general to draw a quadrilateral accurately.

Use the measurements shown to make an accurate drawing of this quadrilateral.

Here are three angles. Two of the angles are equal. The diagram shows one angle of $100°$. Calculate the other two angles. There are two possible answers.

Find out the unknown angles $a, b, c,$ and $d$.

Make an accurate drawing of this diagram, then measure angle $C$.