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Understanding Circle Parts

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Questions and Answers

What is the geometric term for the point in the middle of a circle?

Center (correct)

Vertex

Apex

Endpoint

Which term refers to the longest possible chord in a circle that passes through the center?

Radius

Diameter (correct)

Circumference

Chord

What is the formula to calculate the area of a circle?

$A = \frac{1}{2}\pi r$

$A = \pi r^2$ (correct)

$A = \pi(2r)$

$A = 2\pi r$

Which line segment connects two points on a circle but does not necessarily pass through the center?

Chord Signup and view all the answers

What is the distance around a circle called?

Circumference Signup and view all the answers

What is the term for a line segment that connects two points on a circle and passes through the center?

Diameter Signup and view all the answers

In terms of circles, what does the radius represent?

Distance from the centre to any point on the circle Signup and view all the answers

What do we call each part into which a circle is divided by its longest chord?

Semi Circle Signup and view all the answers

Which term refers to the distance around a circle?

Circumference Signup and view all the answers

If a circle has a radius of 5 units, what is its area using the formula A = πr²?

$25π$ square units Signup and view all the answers