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