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Questions and Answers
What is the value of the determinant of a 2x2 matrix with elements a, b, c, and d?
What is the value of the determinant of a 2x2 matrix with elements a, b, c, and d?
- ad - bc (correct)
- a^2 + b^2 - c^2 - d^2
- ab - cd
- a + b + c + d
What is the equation of a circle with center (h, k) and radius r?
What is the equation of a circle with center (h, k) and radius r?
- (x + h)^2 + (y + k)^2 = r^2
- (x - h)^2 - (y - k)^2 = r^2
- (x + h)^2 - (y + k)^2 = r^2
- (x - h)^2 + (y - k)^2 = r^2 (correct)
What is the sum of the interior angles of a polygon with n sides?
What is the sum of the interior angles of a polygon with n sides?
- (n-2) * 180 degrees (correct)
- (n+2) * 180 degrees
- (n-1) * 180 degrees
- n * 180 degrees
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Study Notes
Matrix Algebra
- The determinant of a 2x2 matrix with elements a, b, c, and d is ad - bc.
Geometry
- The equation of a circle with center (h, k) and radius r is (x - h)^2 + (y - k)^2 = r^2.
Geometry of Polygons
- The sum of the interior angles of a polygon with n sides is 180(n - 2) degrees.
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