Math, asked by ashika99, 1 year ago

please 8,9,10,11,12 answer fast mark as brainlist

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kaneshaurya: Hi anshika wanna sex

Answers

Answered by vikas2004
3

Answer:

8.4a^2  [Ar increases by 4 times]

9.2(lxb)   [Ar doubles]

10.b x 2h [Ar increases by 4 times]

11.b x 2h [Ar increases by 4 times]

12.4,000 tiles are required

Step-by-step explanation:

8.area of square= a^2

if doubled then one side is 2a

then area of square is = (2a)^2  

=4a^2    [Ar increases by 4 times]


9.area of rectangle=lxb

if sides are doubled then

=2l x 2b=2(lxb)   [Ar doubles]


10.area of parallelogram= l x b

if base and height is doubles then

=2b x 2h       [Ar increases by 4 times]


11.area of triangle = 1/2 x b x h

if base and height is doubled then

=1/2 x 2b x 2h

=b x 2h [Ar increases by 4 times]


12.Area of room 6m long and 4m wide = 24 m^2

Area of room 12m long and 8m wide = 96 m^2

tiles for 1st room = 1000

{Cross multiplying}

24                     1000

96                        X

⇒24X = 96,000

X = 96,000 / 24

X = 4,000 tiles are required

PLS MARK ME AS THE BRAINLIEST. THE ANSWERS ARE CORRECT.



ashika99: Thanks
Answered by DivyaraniBhardwaj
0

Answer:

hey ashika panika

Step-by-step explanation:

ans 9-- if the length and breadth of rectangle are doubled then area becomes four-time the first area

ans 11 -- let the base = b

height = h

area of triangle = 1 / 2 × b × h

= 1 / 2×bh. = 1 / 2

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