Q: What is the diametre of a circle if the radius is 46mm?

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It is 25cm

Measure the diametre of the circle and divide by two to give the radius.

that is the radius. the diametre is the line going right accross the middle of the circle

half of a diametre is radius. hence multiply the diameter by 0.5 then use the formular of cicumference, which is 2*pie*r

2.35

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It is 25cm

Measure the diametre of the circle and divide by two to give the radius.

Diametre = 2*radius so diameter = 24.8 metres.

The circumference of a circle = pi*diametre = 2pi*radius

diametre of circle

No. An arc is part of the circumference - the rounded bit.

Diametre is, since diametre = 2*radius

that is the radius. the diametre is the line going right accross the middle of the circle

2*radius=diametre radius=2.1 Area=pi*(radius)^2 Area=3.1428*2.1*2.1 Area=13.86

To calculate the radius is very easy, the formula is d/2 where d is diametre. therefore according to d/2 = 9cm/2 which is equals to 4.5 cm Result : the radius of a circle with a diameter of 9 cm is 4.5 cm.

half of a diametre is radius. hence multiply the diameter by 0.5 then use the formular of cicumference, which is 2*pie*r

2.35