QQuestion
The coordinates of the vertices of triangle ABC are respectively (−4, −2), (6, 2) and (4, 6). The centroid G of triangle ABC is:
(a) (2, 2)
(b) (2, 3)
(c) (3, 3)
(d) (0, −1)
The coordinates of the vertices of triangle ABC are respectively (−4, −2), (6, 2) and (4, 6). The centroid G of triangle ABC is:
(a) (2, 2)
(b) (2, 3)
(c) (3, 3)
(d) (0, −1)
(a) (2, 2)
Explanation:
Centroid = \left(\frac{\mathrm{x_1+x_2+x_3}}{3},\frac{\mathrm{y_1+y_2+y_3}}{3}\right)
= \left(\frac{-4+6+4}{3},\frac{-2+2+6}{3}\right)
= (2, 2).
More ICSE Moderate level questions
In the given figure, AOB is a right-angled triangle and C is the midpoint of the hypotenuse AB. If the coordinates of C are (x, y), the point equidistant from A, O and B is: (a) (x, y) (b) (y, x) (c) (x/2, y/2) (d) (2x/3, 2y/3)
A(−10, −2) and B(2, 10) are two end points of a line segment. If AB intersects the x-axis at P, find the: (a) ratio in which P divides AB. (b) coordinates of point P.
A and B are two points on the x-axis and y-axis respectively, as shown in the figure. (a) Write down the coordinates of A and B. (b) P is a point on AB such that AP : PB = 3 : 1. Using the section formula, find the coordinates of P. (c) Find the equation of a line passing through P and perpendicular to AB.
ABC is a triangle whose vertices are A(1, −1), B(0, 4) and C(−6, 4). D is the midpoint of BC. Find: (a) the coordinates of D (b) the equation of the median AD.
In the given diagram, ABC is a triangle, where B(4, −4) and C(−4, −2). D is a point on AC. (a) Write down the coordinates of A and D. (b) Find the coordinates of the centroid of △ABC. (c) If D divides AC in the ratio k : 1, find the value of k. (d) Find the equation of the line BD.
Assertion (A): The 9th term of the G.P. 6, −12, 24, −48, … is positive. Reason (R): (−2)⁸ is positive. (a) A is true and R is false. (b) A is false and R is true. (c) Both A and R are true and R is the correct explanation of A. (d) Both A and R are true but R is not the correct explanation of A.
In the given figure, ABCD is a cyclic quadrilateral. DE is produced to E and ∠CDE = 65°. If x is the angle subtended by chord AC at the centre, then x is: (a) 32.5° (b) 65° (c) 115° (d) 130°
In the given diagram, chords AC and BC are equal. If ∠ACD = 120°, then ∠AEC is: (a) 30° (b) 60° (c) 90° (d) 120°
The quadratic equation 3x² + √7x + 2 = 0 has: (a) two equal real roots. (b) two distinct real roots. (c) more than two real roots. (d) no real roots.
The factor common to the two polynomials x² − 4 and x³ − x² − 4x + 4 is: (a) (x + 1) (b) (x − 1) (c) (x − 2) (d) (x − 4)
The nature of the roots of the equation 3x² − 6x − 3 = 0 is: (a) Real and equal (b) Real, distinct and rational (c) Real, distinct and irrational (d) No real roots
Find the equation of a line whose y-intercept is 6 and is parallel to x-axis. (a) y = 6 (b) x = 6 (c) x + y = 6 (d) y − x = 6