3 years ago

What is the circumference of a circle with a diameter 9cm

2 answers:

5 0

The circumference follows the formula
C= 2 (pi)R
R is the radius which is half the diameter when we put this into the equation we get
C = 2 (pi)(4.5)
C=28.274334

telo118 [61]3 years ago

3 0

Circumference is basically pi x diameter or pi x 2(radius)
in this situation it would be easier to multiple pi by 9 .
this would tell you what the circumference is .
pi x 9 = <span>28.2743338823

hope this helps you</span>

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Perpendicular lines AB and CD Intersect at point E. If m<AED=×+20, wha is the value of x

vladimir1956 [14]

Answer:

x = 70°

Step-by-step explanation:

Itz given that AB & CD are perpendicular to each other and intersect at E . So , angle(AED) = 90°

But here the value of angle(AED) = 90°

So,

x + 20 = 90°

=> x = 90° - 20°

= 70°