Question

The diagonal of one rombhus is 30 cm their area is240sq c.m find its perimetet​

Answer 1

Answer:

68cm

Step-by-step explanation:

Given = diagonal of a rhombus = 30 cm

Area = 240sq c.m

Find = perimeter

Solution..

perimeter of a rhombus= Aa

Area of rhombus = 1/2 × product of diagonal

240=1/2 × d1 × d2= 480= 30×d2

d2 = 16 cm

In ∆ AOB ; AB°2 = AO°2 + OB°2 = 15°2 + 18°2 = 289

AB=√ 289= 17 cm ; a = 17 cm

perimeter = Aa = 68 cm

HENCE, PERIMETER OF A RHOMBUS IS 68 CM.