Diagram NOT accurately drawn
-20 cm
A semicircle has a diameter of 20 cm.
Work out the perimeter of the semicircle.
Take the value of an to be 3.14
(3 marks)
cm
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31.4 cm

Step-by-step explanation:

se the forumula of the circonference 2r*pi. We aready have the 2 times radius (20 cm) and pi, but we have to divide by 2 the result because it is a semicircle. so 20*3.14/2= 31.4 cm

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step-by-step explanation:

the number of possible outcomes that do not show a 1 on the first spinner and show the number 4 on the second spinner is 2.

spinner 1 spinner 2

1                     1

1                     2

1                     3

1                     4

2                   1

2                   2

2                   3

2                   4   = not 1, and 4

3                   1

3                   2

3                   3

3                   4 = not 1, and 4

only 2 outcomes have passed the given condition.

step-by-step explanation: