Quadrilaterals.Презентация к уроку геометрии на английском языке

QUADRILATERALS

Mikhailichenko Yelena , Tsoy Svetlana

Polygon

A POLYGONE is a many-sided shape. Sides and angles are the same. Quadrilateral has 4 sides and 4 angles .

Parallelogram

Types of quadrilaterals

Parallelogram has two pairs of parallel sides. Its parallel sides are equal. Its opposite angles are equal too.

Rhombus is parallelogram too. Its sides are all equal.

Square has all equal sides and all equal angles too.

Rectangle is a parallelogram which has all equal angles.

Trapezoid has only two parallel sides.

Square

Rhombus

Rectangle

Trapezoid

You must know

The diagonals of a parallelogram are divided in half by the point of intersection.

The diagonals of a rectangle and a square are equal

Diagonals of a rhombus are perpendicular and are the bisectors its angles.

A trapezoid has only one pair of parallel sides. There are only two types of trapezoid .

Trapezoid

Isosceles trapezoid

Rectangle trapezoid

Thanks for your attention!