Respuesta :
The length of the sides of equilateral triangles are as follows
5cm, 15m , 8cm , 300m , 12m , 90mm .
What is meant perimeter of a figure?
The whole length of a shape's boundary is referred to in geometry as the perimeter of the shape. By multiplying the lengths of all the sides and edges that surround an object, the perimeter may be calculated. It is measured in measures of length that are linear, such as centimeters, meters, inches, or feet. A regular polygon's sides are all the same length, as far as we know.
Therefore,
A regular polygon's perimeter is equal to the product of all of its sides, which is equal to the number of sides divided by the length of a side.
The measurement of a shape's length along its outline is known as its perimeter. Simple addition of the lengths of the object's edges serves as the perimeter measurement method.
The perimeter of an equilateral triangle
= 3a where a is each side
So,
(a) P = 15 cm
3a = 15
a = 5
each side = 5 cm
(b) 45 m
3a = 45
a = 15 m
each side = 15 m
(c) 24 m
3a = 24
a = 8 cm
each side = 8 cm
(d) 900 m
3a = 900
a = 300 m
each side = 300 m
(e) 36 cm
3a = 36
a = 12 cm
each side = 12 cm
(f) 270 mm
3a = 270
a = 90 mm
each side = 90 mm
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