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3 years ago

If diameter of a circle is 28 cm,then the circumference of the circle is equal to

2 answers:

8 0

C = 2 pi r

R is radius and it’s half of diameter
Pi is always a constant = 3.14

Diameter = D = 2r

We substitute the 2r with D

C = D pi = 28*3.14

Circumference = 87.9 cm (don’t forget your units)

ratelena [41]3 years ago

4 0

Answer:87.92

Step-by-step explanation: you multiply the diameter by pie or 3.14 to get the circumference

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fgiga [73]

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Step-by-step explanation:

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3 years ago

Using the sine rule, calculate the length y. Give your answer to 2 s.f.

Tpy6a [65]

Answer:

y = 9.84 mm

Step-by-step explanation:

Law of sine:

$\sf \boxed{\bf \dfrac{a}{Sin \ A}=\dfrac{b}{Sin \ B}= \dfrac{c}{Sin \ C}}$

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b = 17 mm

B = 117°

$\sf \dfrac{y}{Sin \ 31^\circ}=\dfrac{17}{Sin \ 117^\circ}\\\\$

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2 years ago

3 is 25% of what number?

stira [4]

Answer:

Step-by-step explanation:

25%=1/4

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6 0

3 years ago

Read 2 more answers

Evaluate x/y for x equals 3/10 and y equals 4/5

Over [174]

Answer:

x/y = 3/8

Step-by-step explanation:

y = 4/5 = 8/10, so ...

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_____

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3 years ago

Need the answer to this question pls help

notsponge [240]

Answer:

12√x^2.y^9

Step-by-step explanation:

x^1/6 * y^3/4

xy ^ (1/6+3/4)

xy ^ (2/12+9/12)

12√x^2 * y^9

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2 years ago

If diameter of a circle is 28 cm,then the circumference of the circle is equal to​

If diameter of a circle is 28 cm,then the circumference of the circle is equal to