Practice Definition (2.1) - Quadrilaterals & Circles - IB 10 Mathematics

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6 sample questions

Question 1.
Define a circle.
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Think about how distance relates to points in geometry.
Question 2.
What is the formula for diameter?
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Consider the relationship between radius and diameter.
3Question 3.
What is the radius of a circle?
- Distance from center to the circle
- Longest line in the circle
- Diameter divided by two
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Consider what you measure from the center.
4Question 4.
True or False: The diameter is the longest chord of the circle.
- True
- False
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Think about the definition of a chord.
Question 5.
A circle has a radius of 10 cm. What is the area of the sector formed by a 120-degree angle at the center?
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Recall the sector area formula, and break down the calculation.
Question 6.
Two tangents are drawn from an external point to a circle of radius 5 cm. If the distance from the external point to the center of the circle is 13 cm, what is the length of each tangent?
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Think about the right triangle formed using the radius and the tangent.

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