1. Objective: Learn to name and classify quadrilaterals.

2. A quadrilateral is a four sided figure.
We will learn about various types of quadrilaterals. The most common are the rectangle and the square. Then we have parallelograms, rhombuses, and trapezoids.
A parallelogram has 2 pairs of parallel sides
and 2 pairs of congruent sides.
A rectangle is like a parallelogram with
4 right angles.
The square has 4 right angles and 4
congruent sides.

3. Quadrilaterals… 4 equal (congruent) sides.
The trapezoid has only one pair of parallel lines.
The rhombus is like a parallelogram with
4 equal (congruent) sides.

4. Chart of Quadrilaterals:

5. When finding the measure of unknown angles…
The sum of all angles in a quadrilateral add up to 3600.
When they ask you to find the missing angle, you must add the 3 angles then subtract them from the total, which is 360 degrees.
So, 106o + 131o+ 67o = 304o
Then, 360 – 304 = 56o degrees.

6. Homework: