As per the question given: \[tan\text{ }A\text{ }=\text{ }5/6\text{ }and\text{ }tan\text{ }B\text{ }=\text{ }1/11\] Since,\[tan\text{ }\left( A\text{ }+\text{ }B \right)\text{ }=\text{ }\left(...
The points A (x1, y1), B (x2, y2) and C (x3 y3) are the vertices of ABC.
(i) Find the coordinates of points Q and R on medians BE and CF, respectively such that BQ : QE = 2 : 1 and CR : RF = 2 : 1
(ii) What are the coordinates of the centroid of the triangle ABC?
Solution: (i) Let (p, q) be the coordinates of a point Q. Provided, The point Q (p, q), Divide the line joining $\mathrm{B}\left(\mathrm{x}{2}, \mathrm{y}{2}\right)$ and...
The points A (x1, y1), B (x2, y2) and C (x3 y3) are the vertices of ABC. (i) The median from A meets BC at D. Find the coordinates of the point D. (ii) Find the coordinates of the point P on AD such that AP : PD = 2 : 1
Solution: According to the given question, A, B and C are the vertices of ΞABC A(x1, y1), B(x2, y2), C(x3, y3) are the coordinates of A, B and C. (i) According to the information provided, D is BC's...
A (6, 1), B (8, 2) and C (9, 4) are three vertices of a parallelogram ABCD. If E is the midpoint of DC, find the area of β³ ADE.
Solution: According to the given question, A (6, 1), B (8, 2) and C (9, 4) are the three vertices of a parallelogram ABCD Let (x, y) be the fourth vertex of parallelogram. It is known to us that,...
If (β 4, 3) and (4, 3) are two vertices of an equilateral triangle, find the coordinates of the third vertex, given that the origin lies in the interior of the triangle.
Solution: Let (x,y) be the vertices. The distance between (x,y) & (4,3) is $=\text{ }\surd ({{\left( x-4 \right)}^{2}}~+\text{ }{{\left( y-3 \right)}^{2}})$β¦β¦(1) The distance between (x,y) &...
In what ratio does the xβaxis divide the line segment joining the points (β 4, β 6) and (β1, 7)? Find the coordinates of the point of division.
Solution: Let 1: k be the ratio in which x-axis divides the line segment joining (β4, β6) and (β1, 7). Therefore, x-coordinate is (-1 β 4k) / (k + 1) y-coordinate is (7 β 6k) / (k + 1) y coordinate...
Find the area of the triangle whose vertices are (β8, 4), (β6, 6) and (β3, 9).
Solution: The provided vertices are: $({{x}_{1}},\text{ }{{y}_{1}})\text{ }=\text{ }\left( -8,\text{ }4 \right)$ $({{x}_{2}},\text{ }{{y}_{2}})\text{ }=\text{ }\left( -6,\text{ }6 \right)$...
If the point A (2, β 4) is equidistant from P (3, 8) and Q (β10, y), find the values of y. Also find distance PQ.
Solution: $A(2,-4), P(3,8)$ and $Q(-10, y)$ are the given points. Now according to the question given, $$ \begin{aligned} P A &=Q A \\ \sqrt{(2-3)^{2}+(-4-8)^{2}} &=\sqrt{(2+10)^{2}+(-4-y)^{2}} \\...
Find the value of m if the points (5, 1), (β2, β3) and (8, 2m) are collinear.
Solution: The points given here i.e., A(5, 1), B(β2, β3) and C(8, 2m) are collinear. Therefore the area of βABC = 0 ${\scriptscriptstyle 1\!/\!{ }_2}\text{ }[{{x}_{1}}~({{y}_{2}}~\text{...
Find the coordinates of the point Q on the xβaxis which lies on the perpendicular bisector of the line segment joining the points A (β5, β2) and B(4, β2). Name the type of triangle formed by the points Q, A and B.
Solution: As the point P lies on the perpendicular bisector of AB, point Q is the midpoint of AB . By the formula for midpoint: $({{x}_{1}}~+\text{ }{{x}_{2}})/2\text{ }=\text{ }\left( -5+4...
Find a point which is equidistant from the points A (β5, 4) and B (β1, 6)? How many such points are there?
Solution: Let P be the point. Now according to the given question, P is at equal distance from A (β5, 4) and B (β1, 6) Then the point P $=\text{ }(({{x}_{1}}+{{x}_{2}})/2,\text{...
Find the value of a, if the distance between the points A (β3, β14) and B (a, β5) is 9 units.
Solution: The distance between the two points (x1,y1) ( x2,y2) : $d=\surd ({{x}_{2}}-{{x}_{1}}){}^\text{2}+({{y}_{2}}-{{y}_{1}}){}^\text{2}$ The distance between A (β3, β14) and B (a, β5): $=\surd...
What type of a quadrilateral do the points A (2, β2), B (7, 3), C (11, β1) and D (6, β6) taken in that order, form?
Solution: A (2, β2), B (7, 3), C (11, β1) and D (6, β6) are the given points. Now using the distance formula, $d~=\text{ }\surd \text{ }({{({{x}_{2}}~\text{ }{{x}_{1}})}^{2}}~+\text{...
Find the points on the xβaxis which are at a distance of 2β5 from the point (7, β4). How many such points are there?
Solution: (x, 0) = Let coordinates of the point (given that the point lies on x axis) ${{x}_{1}}=7.\text{ }{{y}_{1}}=-4$ ${{x}_{2}}=x.\text{ }{{y}_{2}}=0$ Distance $=\surd...
Name the type of triangle formed by the points A (β5, 6), B (β4, β2) and C (7, 5).
Solution: A (β5, 6), B (β4, β2) and C (7, 5) are the given points. Now, using the distance formula, $d~=\text{ }\surd \text{ }({{({{x}_{2}}~\text{ }{{x}_{1}})}^{2}}~+\text{ }{{({{y}_{2}}~\text{...
State whether the following statements are true or false. Justify your answer. Points A (4, 3), B (6, 4), C (5, β6) and D (β3, 5) are the vertices of a parallelogram.
Solution: The statement given in the question is false. Justification: A (4, 3), B (6, 4), C (5, β6) and D (β3, 5) are the points given. We need to find the distance between A and B...
State whether the following statements are true or false. Justify your answer. Points A (3, 1), B (12, β2) and C (0, 2) cannot be the vertices of a triangle.
Solution: The statement given in the question is true. Justification: Coordinates of A $=\text{ }({{x}_{1}},\text{ }{{y}_{1}})\text{ }=\text{ }\left( 3,\text{ }1 \right)$ Coordinates of B $=\text{...
State whether the following statements are true or false. Justify your answer. Point P (0, 2) is the point of intersection of yβaxis and perpendicular bisector of line segment joining the points A (β1, 1) and B (3, 3).
Solution: The statement given in the question is false. Justification: We know that the points on the perpendicular bisector of the line segment joining two points are equidistant from the two...
Choose the correct answer from the given four options in the following questions: The distance of the point P (β6, 8) from the origin is (A) 8 (B) 2β7 (C) 10 (D) 6
Solution: Option (C) 10 is the correct answer. The formula for distance: ${{d}^{2}}~=\text{ }{{({{x}_{2}}~\text{ }{{x}_{1}})}^{2}}~+\text{ }{{({{y}_{2}}~\text{ }{{y}_{1}})}^{2}}$ According to the...
Choose the correct answer from the given four options in the following questions: The area of a triangle with vertices A (3, 0), B (7, 0) and C (8, 4) is (A) 14 (B) 28 (C) 8 (D) 6
Solution: Option (C) 8 is the correct answer. The vertices of the triangle are, $A\text{ }({{x}_{1}},\text{ }{{y}_{1}})=\left( 3,\text{ }0 \right)$ $B\text{ }({{x}_{2}},\text{ }{{y}_{2}})=\left(...
Choose the correct answer from the given four options in the following questions: The perimeter of a triangle with vertices (0, 4), (0, 0) and (3, 0) is (A) 5 (B) 12 (C) 11 (D) 7+ β5
Solution: Option (B) 12 is the correct answer. (0, 4), (0, 0) and (3, 0) are the vertices of a triangle. The perimeter of triangle AOB = Sum of the length of all its sides: = distance between...
Choose the correct answer from the given four options in the following questions: AOBC is a rectangle whose three vertices are vertices A (0, 3), O (0, 0) and B (5, 0). The length of its diagonal is (A) 5 (B) 3 (C) β34 (D) 4
Solution: Option (C)Β β34 is the correct answer. The three vertices are: $A\text{ }=\text{ }\left( 0,\text{ }3 \right)$, $O\text{ }=\text{ }\left( 0,\text{ }0 \right)$ , $B\text{ }=\text{ }\left(...
Choose the correct answer from the given four options in the following questions: The distance between the points (0, 5) and (β5, 0) is (A) 5 (B) 5β2 (C) 2β5 (D) 10
Solution: Option (B)Β 5β 2 is the correct answer. Distance formula: ${{d}^{2}}~=\text{ }{{({{x}_{2}}~\text{ }{{x}_{1}})}^{2}}~+\text{ }{{({{y}_{2}}~\text{ }{{y}_{1}})}^{2}}$ According to the given...
Choose the correct answer from the given four options in the following questions: The distance between the points A (0, 6) and B (0, β2) is (A) 6 (B) 8 (C) 4 (D) 2
Solution: Option (B) 8 is the correct answer. The formula for distance : ${{d}^{2}}~=\text{ }{{({{x}_{2}}~\text{ }{{x}_{1}})}^{2}}~+\text{ }{{({{y}_{2}}~\text{ }{{y}_{1}})}^{2}}$ According to the...
Choose the correct answer from the given four options in the following questions: The distance of the point P (2, 3) from the x-axis is (A) 2 (B) 3 (C) 1 (D) 5
Solution: Option (B) 3 is the correct answer. We all know that, On the Cartesian plane (x, y) is a point in first quadrant. Then, Perpendicular distance from Yβaxis = x, and Perpendicular distance...