Question

1. The width of a rectangle is 9cm and its diagonal is 15 cm. What is its perimeter?​

Answer 1

Step-by-step explanation:

L=15 (Length = L;B = Breadth;H = diagonal)

H=17 cm

L

2

+B

2

=H

2

⇒(15)

2

+B

2

=(17)

2

⇒225+B

2

=289

⇒B

2

=289−225

⇒B

2

=64

⇒B=

64

⇒B=8 cm.

Breadth =8 cm.

Area of rectangle =L×B=15×8=120m

2

.

Perimeter of rectangle =2(L+B)

=2(15+8)

=2(23)

=46 cm.

Answer 2

Step-by-step explanation:

36 cm

w=9,d=15

then perpendicular=√15²-9²

=12

now,perimeter=15+12+9=36