Question

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Find the missing measures for the rectangle.

l = _?_
w = 2 cm
A = _?_
P = 25 cm

12.5 cm; 21 cm2

10.5 cm; 21 cm2

12.5 cm; 25 cm2

10.5 cm; 25 cm2

Answer 1

we know that
[area of rectangle]=l*w
[perimeter of rectangle]=2*[l+w]
w=2 cm
P=25 cm
so
[perimeter of rectangle]=2*[l+w]--------> 25=2*[l+2]----> l=(25/2)-2---> l=10.5 cm
[area of rectangle]=l*w--------> 10.5*2--------> 21 cm²

the answer is
l=10.5 cm
A=21 cm²