Practice Circles (2) - Quadrilaterals & Circles - IB 10 Mathematics

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8 questions

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4 cards from this section. Quick, good the night before a test.
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5 questions · about 3 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is the radius of a circle if its diameter is 10 cm?
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Remember, radius is half of the diameter.
Question 2.
Can you name a part of the circle that touches the circle at one point?
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Think about lines that touch curves.
3Question 3.
What is the formula for the circumference of a circle?
- C = πr²
- C = 2πr
- C = r²
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Remember, circumference relates to the radius.
4Question 4.
True or False: A line that intersects a circle at two points is called a tangent.
- True
- False
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Visualize how lines can interact with circles.
Question 5.
Given a circle with a radius of 12 cm, find the area of a sector that subtends an angle of 135°.
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Remember to convert the angle into a fraction of 360°.
Question 6.
Prove that tangents drawn from an external point to a circle are equal.
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Start by labeling the points and drawing the necessary lines.

4 more questions in this section. Enroll free to practise them all.