the diagonals of a rhombus are 16cm and 30cm. find its perimeter . if one of its angle is 70°,find the other angle
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diagonals are:
d1 = 16cm
d2 = 30cm
let the side of the rhombus = x cm
x^2 = (d1/2)^2 + (d2/2)^2
=> x^2 = (16/2)^2 + (30/2)^2
=> x^2 = 8^2 + 15^2 = 289
=> x = √289 = 17cm
perimeter = 17*4 = 68 cm
If one angle is 70, other angle = 180 - 70 = 110 degree
d1 = 16cm
d2 = 30cm
let the side of the rhombus = x cm
x^2 = (d1/2)^2 + (d2/2)^2
=> x^2 = (16/2)^2 + (30/2)^2
=> x^2 = 8^2 + 15^2 = 289
=> x = √289 = 17cm
perimeter = 17*4 = 68 cm
If one angle is 70, other angle = 180 - 70 = 110 degree
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