KcetThree Dimensional GeometryKCET 2026MCQ+1 / -02026The three points $A(2, 4, 3), B(4, a, 9)$ and $C(10, -1, 7)$ form a right-angled triangle with $\angle B = 90^\circ$, then the value of "a" isA$1$ or $4$B$-1$ or $4$C$1$ or $-4$D$-1$ or $-4$Check AnswerClear SelectionReveal AnswerShow Explanation
