1. Quadrilaterals 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 rectangle is like a parallelogram with 4 right angles. The square has 4 right angles and 4 congruent  sides.  A parallelogram has 2 pairs of parallel sides and 2 pairs of congruent sides. 

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

4. When finding the measure of unknown angles… The sum of all angles in a quadrilateral add up to 360 0. 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, 106 o + 131 o + 67 o = 304 o 56 o degrees. Then, 360 – 304 = 56 o degrees.

5. Homework: