Copyright@Ed2netLearning,Inc1 GEOMETRY Grade 3. copyright@Ed2netLearning,Inc2 Hello, How are you doing? Today, we are going to begin new lesson

copyright@Ed2netLearning,Inc 1

GEOMETRY

Grade 3


Hello, How are you doing?Today, we are going to begin new lesson.


Solid Figures• 2-dimensional figure – A

figure that has only length and width.Example: square, rectangle, circle

• 3-dimensional figure – A figure that has length, width and height.Example: cube, cone

Circle

Cube


2-dimensional figureSquare: 4 sides and 4 angles. All sides are

equal.

Rectangle: 4 sides and 4 angles. Opposite sides are equal.

Triangle – 3 sides and 3 angles.


3- dimensional figures Rectangular Prism

Cylinder

Vertex

Flat Face

Straight Edge

Curved face

Curved Edge


What is the shape of the orange Juice shown in the figure?Answer- Cylinder

Orange

Juice


Lines and Line-segments• Line – A straight path that goes in two

directions without ends.

• Line Segments – Lines that stay the same distance apart from each other.


Name each figure.

Answer- a) Triangleb) Rectangular Prismc) Line

A B C


Intersecting and Parallel lines• Intersecting lines –

lines that meet or cross at a common point.

• Parallel lines – lines that stay the same distance apart from each other. They do not cross.

Intersecting Lines

Parallel lines


Ray• A ray is a straight line.• It has one end point and goes on without

end in 1 direction.


Angles

• An angle is formed by 2 rays with the same end point.

• Right Angle – A right angle forms a square corner.


Polygon• Polygon is a closed

figure with straight sides.Example: hexagon, pentagon, octagon

Closed figure but not a polygon

Polygon


Polygon• A pentagon has 5 sides and 5 angles.• A hexagon has 6 sides and 6 angles.• An octagon has 8 sides and 8 angles.

Hexagon Pentagon Octagon


Identify and Draw each Polygona) It has 3 sides.b) It has 4 sides. All are equal.Answer – a) Triangleb) Square or Rhombus

Triangle Square


QuadrilateralA closed figure with four

sides.Example: Rectangle, square,

Trapezium, Rhombus

Parallelogram – Quadrilateral having both pair of opposite sides parallel.

Trapezoid – Quadrilateral having only one pair of parallel sides.

Trapezoid

Parallelogram


Nick made a pentagon using 5 toothpicks. He now wants to change pentagon to octagon. How many more toothpicks does he need?

Answer- 3


Bob makes two different quadrilaterals with 4 equal sticks. What two quadrilaterals did he make?

Answer- square and Rhombus


Drawa) rayb) Parallel lines

Answer-

Ray

Parallel lines


ASSESSMENT


1. How many Crayons do we need to draw a) Hexagonb) Square

Answer- a) 6b) 4


2. Identify each Quadrilateral

Answer- a) Trapezium b) Rhombus

c) parallelogram

A B C


3. Which among the following is a polygon?

Answer- B

A B C D


4. Name each figure

Answer- a) Intersecting Linesb) Linec) Ray

A B C


5. Alex drew a square. How many right angles did he draw?Answer- 4


6. How many sides does each figure has?a) Rhombusb) Triangle

Answer- a) 4 b) 3


7. What kind of lines are in the alphabet X ?Answer- Intersecting Lines


8. Circle the 2-dimensional figures.

Answer- B, D and E

A B C D E


9. Name all the shapes in the figure?

Answer- Rectangle, Square, Circle, Triangle, Parallelogram


10. Mike traced around the bottom of a box shaped like the, rectangular prism( figure shown). What shape did Mike draw?Answer- Rectangle


Good Work!Now Practice worksheets on the Lesson.

Documents

Copyright@Ed2netLearning,Inc1 GEOMETRY Grade 3. copyright@Ed2netLearning,Inc2 Hello, How are you doing? Today, we are going to begin new lesson