7. A piece of string is 30cm long. What will be the length of each side if the string is used to form a regular decagon? 8. Constr

Question

7. A piece of string is 30cm long. What will be the length of each side if the string is
used to form a regular decagon?
8. Construct a perpendicular to a line through a point not lying on the line using
set square and ruler.​

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5 months 2022-01-06T01:45:03+00:00 2 Answers 0 views 0

Answers ( )

    0
    2022-01-06T01:46:12+00:00

    Answer:

    Step-by-step explanation:

    The string length is the perimeter of the shape.

    ∴ For each case, perimeter=30cm

    (i) Square

    A square has all the side equal.

    Perimeter=4×(side of square)

    ∴side of square=  4

    perimeter
    =  4
    /30  =7.5cm

    Hence, length of each side if the string is used to form a square will be 7.5 cm.

    (ii) Equilateral triangle

    An equilateral triangle has three equal sides.

    Perimeter=3×(side)

    ∴side=  3

    perimeter  = 3/30  =10cm

    Hence, length of each side if the string is used to form an equilateral triangle will be 10 cm.

    (iii) Regular hexagon

    A regular hexagon has six equal sides.

    Perimeter=6×(side)

    ∴side=  6

    perimeter=  6
    /30
    = 5cm

    Hence, length of each side if the string is used to form a regular hexagon will be 5 cm

    0
    2022-01-06T01:46:54+00:00

    Step-by-step explanation:

    string length = perimeter of the regular decagon

    30cm=side ×10

    Therefore,side is 3 cm.

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