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and are two of the vertices of a triangle Its area is 20 square ems. The vertex lies on the line The coordinates of are
detailed solution
Correct option is D
Let the coordinates of the third vertex C be (h, k). Then, Area of ABC = 20 sq. units ⇒ 12h k 1−5 0 13 0 1=±20⇒k=±5. …(i)Since, (h, k) lies on x-y=2 Therefore, h−k=2 …(ii)Solving (i) and (ii), we find that the coordinates of the third vertex are (-3,-5) or,(7, 5).Talk to our academic expert!
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Consider a point where m and n are positive integers.B is the reflection of A in the line is the reflection of B in the y-axis, D is the reflection of C in the x-axis and E is the reflection of D in the y-axis. The area of the pentagon is
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