Question

find the perimeter of a rhombus with diagonal 30 cm and 40 cm long​

Answer 1

Step-by-step explanation:

Let,

BD=30cm

AC=40cm

Let the middle point be O

So,

AO=20 cm and BO=15 cm

Using Pythagoras Theorem

(AB)

2

=(AO)

2

+(BO)

2

⇒(AB)

2

=20

2

+15

2

⇒(AB)

2

=400+225

⇒(AB)

2

=625cm

⇒AB=25cm

∵All sides of rhombus are equal so

Perimeter of a rhombus = 4×(side)

=4×25

= 100 cm

∴Perimeter of a rhombus is 100 cm

Answer 2

Answer:

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