Power point on introducing geometry and a review of known shapes.

1. FUN WITH GEOMETRICAL FIGURES

2. FINDING SHAPES:
 USE THE FINDING SHAPES WORKSHEET PROVIDED AND
FIND SHAPES AROUND THE ROOM THAT FIT INTO EACH
CATEGORY:
 CIRCLES TRIANGLES
 SQUARES RECTANGLES
 FIND AS MANY SHAPES AS YOU CAN IN 5 MINUTES, GO!

4. COMMON SHAPES &
CHARACTERISTISCS:
What are some characteristics of a circle?
What about a triangle?
A square and rectangle?
What do we notice about the square and
rectangle and their similarities?

5. COMMON SHAPES:
 CIRCLE – A SET OF POINTS EQUAL DISTANCE FROM A GIVEN
POINT, CALLED THE CENTER OF THE CIRCLE WITH NO ANGLES.
 RECTANGLE –
 SQUARE –
 TRIANGLE –

6. COMMON SHAPES:
 CIRCLE – A SET OF POINTS EQUAL DISTANCE FROM A GIVEN
POINT, CALLED THE CENTER OF THE CIRCLE WITH NO ANGLES.
 RECTANGLE – A SHAPE THAT HAS 4 POINTS AT 4 CORNERS WITH
2 SHORT SIDES OF EQUAL LENGTH THAT ARE OPPOSITE OF EACH
OTHER AND 2 LONG SIDES OF EQUAL LENGTH THAT ARE
OPPOSITE OF EACH OTHER. THIS SHAPE HAS 4 RIGHT ANGLES.
 SQUARE –
 TRIANGLE –

7. COMMON SHAPES:
 CIRCLE – A SET OF POINTS EQUAL DISTANCE FROM A GIVEN
POINT, CALLED THE CENTER OF THE CIRCLE WITH NO ANGLES.
 RECTANGLE – A SHAPE THAT HAS 4 POINTS AT 4 CORNERS WITH 2
SHORT SIDES OF EQUAL LENGTH THAT ARE OPPOSITE OF EACH
OTHER AND 2 LONG SIDES OF EQUAL LENGTH THAT ARE
OPPOSITE OF EACH OTHER. THIS SHAPE HAS 4 RIGHT ANGLES
 SQUARE – A RECTANGLE WITH 4 CONGRUENT SIDES AND 4 RIGHT
ANGLES.
 TRIANGLE -

8. COMMON SHAPES:
 CIRCLE – A SET OF POINTS EQUAL DISTANCE FROM A GIVEN
POINT, CALLED THE CENTER OF THE CIRCLE WITH NO ANGLES.
 RECTANGLE – A SHAPE THAT HAS 4 POINTS AT 4 CORNERS WITH
2 SHORT SIDES OF EQUAL LENGTH THAT ARE OPPOSITE OF
EACH OTHER AND 2 LONG SIDES OF EQUAL LENGTH THAT ARE
OPPOSITE OF EACH OTHER. THIS SHAPE HAS 4 RIGHT ANGLES
 SQUARE – A RECTANGLE WITH 4 CONGRUENT SIDES AND 4
RIGHT ANGLES.
 TRIANGLE – A SHAPE WITH 3 SIDES AND 3 ANGLES.
 **Now draw each shape next to its definition**

9. TYPES OF TRIANGLES:
ACUTE ANGLE – AN ANGLE LESS THAN 90 DEGREES
--show me with your arms what this angle looks like?
 OBTUSE ANGLE – AN ANGLE GREATER THAN 90
DEGREES
-- show me with your arms what this angle looks like?
 RIGHT TRIANGLE – A TRIANGLE WITH ONE 90
DEGREE ANGLE AND 2 ACUTE ANGLES
 --show me with your arms what this angle looks like?

10. NOW LET’S TRY TO DRAW THESE!
 What do you notice about the sides of these different triangles?
 What about the shapes each triangle makes?
-- Let’s Discuss!

11.  SCALENE TRIANGLE – ALL 3 SIDES AND ALL 3
ANGLES ARE DIFFERENT
 --Try and draw this!
 EQUILATERAL TRIANGLE – ALL 3 ANGLES ARE
THE SAME AND ALL 3 SIDES ARE CONGRUENT
 --Try and draw this
 ISOSCELES TRIANGLE – 2 ANGLES ARE THE
SAME AND 2 SIDES ARE CONGRUENT
 --Try and draw this

12. --CAN A TRIANGLE BE ACUTE AND
EQUILATERAL?
-- OBTUSE AND ISOCLELES?
-- ANY COMBINATIONS OF THESE?
WHY OR WHY NOT?
TALK WITH A PARTNER.