The perimeter , P cm, of a rectangle of
length L cm and breadth B cm is given
by P = 2L +2B. Given that P = 20 and
B = 5, find the value of L

5cm

Step-by-step explanation:

P= 2L+2B

P=20cm

B=5cm

L=?

P= 2(L+B)

P/2=L+B

20/2= L+5

10=L+5

L=10-5

L=5cm

1 is c

2 is a

3 is a

step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft