This document discusses different geometrical shapes and their characteristics. It begins with an activity where students find and identify circles, triangles, squares, and rectangles around the room. It then defines each shape, such as a circle as a set of points equidistant from the center, and a rectangle as a shape with two short sides and two long sides forming four right angles. It further explains different types of triangles, such as equilateral triangles with three equal sides and three equal angles. In the end, it prompts students to discuss possible combinations of triangle characteristics.

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.