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Questions and Answers
What is the value of π (pi) correct to two decimal places?
What is the value of π (pi) correct to two decimal places?
- 3.145
- 3.14 (correct)
- 3.142
- 3.141
In a right-angled triangle, if the length of the two sides forming the right angle are 3 and 4 units, what is the length of the hypotenuse?
In a right-angled triangle, if the length of the two sides forming the right angle are 3 and 4 units, what is the length of the hypotenuse?
- 5 units (correct)
- 6 units
- 8 units
- 7 units
If a quadratic equation has complex roots, what can be said about its discriminant?
If a quadratic equation has complex roots, what can be said about its discriminant?
- It is negative (correct)
- It is zero
- It is positive
- It is imaginary
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Study Notes
Mathematics Essentials
- The value of π (pi) is approximately 3.14, correct to two decimal places.
- In a right-angled triangle, the length of the hypotenuse can be calculated using the Pythagorean theorem: √(3² + 4²) = √(9 + 16) = √25 = 5 units.
- A quadratic equation with complex roots has a negative discriminant.
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