## razor99 3 years ago help me plzzzz

1. razor99

|dw:1327404120182:dw|

2. razor99

find the area of the trapezium

3. razor99

i know the formulae but i dont know how to do

4. razor99

here is the formulae

5. King

what do i hav to find?

6. razor99

|dw:1327404394659:dw|

7. razor99

area

8. razor99

plzzzzzzz help me

9. King

area of the whole house is 31cm^2? area of trapezium=16 area of rectangle =15

is that 7 cm?|dw:1327404717507:dw|

11. razor99

yes it 7 cm

12. razor99

this is a trapizium

13. razor99

i dont know how to draw nicely.

14. King

see razor,|dw:1327404780151:dw|

Okay here a=3cm b=5cm h=7-3=4cm Now Area= 1/2(a+b)h= 1/2* 8*4 =16 cm^2

16. razor99

17. King

the whole house is a trapezium.....?

No Its a rectangle + trapezium right ?

19. razor99

yeah

20. razor99

king is correct

21. King

oh!

Question says to find the area of trapezium , not the whole house

23. razor99

yeah but the anserw u gave was wrong

Oh wait then .. letme check again

25. King

the house is the trapezium...

26. razor99

okay the formulae says 1/2(a+b)h

27. King

u need to giv us proper diagram....

28. razor99

but didiya u have multiplied it

29. King

if u hav a question can u post it?

$\frac{1}{2} \times (5+3) \times 4= \frac{1}{2} \times 8 \times 4 =16$

32. razor99

but in the back of the book its say the answer is its 31cm^2

Its the area of the whole house thats area of rectangle + area of trapezium

34. lalaly

yeah diya found the area of the trapezium which the top part =16cm^2 then u find the are a of the rectangle at the bottom, = 5*3 =15cm^2 then the area of the whole thing together is 16+15=31cm^2

35. mark_o.

total At=area of rectangle + area of trapezoid At= 3x5 + (1/2)(3+5)4 At= 15 + 32/2 At= 15 + 16 =31 square meter ans....

36. razor99

ohh i get it know

37. razor99

thanx for the help everyone.

38. King

i gave u answr 31!