Quadrilaterals TeacherTwins©2014

Warm Up 1). 2). 3). Equilateral, acute Isosceles, obtuse Classify each triangle by its sides and angles. 1). 2). 3). Equilateral, acute Isosceles, obtuse Scalene, right 4). A triangle has an angle that measures 35◦ and another angle that measures 67◦. What is the measure of the third angle? 78 degrees

Quadrilateral Flippable

180° + 180° = 360° Quadrilaterals The sum of the angles in a quadrilateral is 360°. ° ° 180° + 180° = 360°

Find the value of x for each quadrilateral. 1). X = 130° 2). X = 140°

Parallelogram Opposite sides are parallel. Opposite sides are congruent (=).

Rectangle Opposite sides are parallel. Opposite sides are congruent. Four right angles.

Square Opposite sides are parallel. Four sides are congruent. Four right angles.

Rhombus Opposite sides are parallel. Four sides are congruent.

Trapezoid One pair of opposite sides parallel.

Parallelogram, rhombus Practice Give all of the possible names for each quadrilateral. Circle the name that is the best name for the figure. parallelogram 1). 2). 3). 4). Parallelogram, rhombus Parallelogram, rectangle Trapezoid

Closure How is a trapezoid different from a rectangle? How are they alike?