1. 9-1 Developing Formulas for s and quads
Geometry

2. Review Perimeter of a square P = a + b + c Perimeter of a Triangle
P = 2l + 2w Perimeter of a rectangle
Pythagorean Theorem

3. Postulate 9-1-1 Area + post
The area of a region is the sum of the areas of its nonoverlapping parts.
Area of triangle +
Area of rectangle

4. Area of a Square
A=s2 __ S __ __ __

5. Area of Rectangle
A=bh __ __ __ __ h __ __ __ __ b

6. Area of a Parallelogram
A=bh
Height is always  to base!
>
>>
>> h __ __
> b

7. Ex. 1a.) Find the Area of the Parallelogram
30 mm mm
34 mm

8. Ex.1b.) Find the height of a rectangle in which b=3 in. A=

9. Ex. 1c.) Find the perimeter of the rectangle in which
21cm

10. Area of a 
A= (½) bh Or A= h b

11. Area of a Trapezoid
A= (½) h(b1+b2) b1
> h
> b2

12. Ex. 2a.) Find the area of a trapezoid in which

13. 2b.) Find the base of the triangle in which5x

14. 2c.) Find the of the trapezoid, in which A= 231 mm²

15. Area of a Rhombus
A= (½) d1d2 __ d2 __ d1 __ __

16. Area of a kite
A= (½) d1d2 __ __ d2 __ d1 __

17. Ex. 3a.) Find of a kite in which and A=238 in²

18. Ex. 3b.) Find the area of the rhombus

19. 3c.) Find the area of the kitey
x in.
29 in in.

20. Assignment

21. @ polygons have the same area.
Post
@ polygons have the same area.
Ummmm…duh?