# Geomatrical Figure - PowerPoint PPT Presentation

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Geomatrical Figure. Present to M.Veerasakdi. By : Jaruphat Zhang Class P.4/6 No.43. Types of Quadrilaterals. Rectangle. A rectangle is a four-side shape where every angle is a right angle (90°). Also opposite sides are parallel and of equal length. Square.

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Geomatrical Figure

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## Geomatrical Figure

Present to

M.Veerasakdi

By : Jaruphat Zhang

Class P.4/6 No.43

### Rectangle

A rectangle is a four-side shape where every angle is a right angle(90°).

Also opposite sides are parallel and of equal length.

### Square

A square has equal sides and every angle is right angle (90º)

Also opposite sides are parallel.

### Parallelogram

Opposite sides are parallel and equal in length, and opposite angles are equal

(angle “a” are the same, and angles “b” are the same)

### Rhombus

A rhombus is a four-sided shape where all sides have equal length.

Also opposite side are parallel amd opposite angles are equal.

### Triangles

There are several different types of triangles.

You can classify a triangle by its sides and its angles.

There are THREE different classifications for triangles based on their sides.

There are FOUR different classifications for triangles based on their angles.

### Classifying Triangles by Sides

EQUILATERAL - 3 congruent sides

ISOSCELES – at least two sides congruent

SCALENE – no sides congruent

### Classifying Triangles by Angles

• EQUIANGULAR – all angles are congruent

• ACUTE – all angles are acute

• RIGHT – one right angle

• OBTUSE – one obtuse angle

### Can You Classify the Different Triangles in the Picture Below?

Classify the following triangles : AED, ABC, ACD, ACE

### The Classifications…

• Triangle AED = Equilateral, Equiangular

• Triangle ABC = Equilateral, Equiangular

• Triangle ACD = Isoceles, Obtuse

• Triangle ACE = Scalene, Right

• So how did you do?