Determine whether triangle with vertices A(0, 0), B(4, 0), C(0, 3) is right-angled.
AYes — at A
BNo, not right-angled
CYes — at B
DYes — at C
Answer & Solution
Correct answer: A. Yes — at A
AB = 4, AC = 3, BC = 5. Check: AB² + AC² = 16 + 9 = 25 = BC². Right angle at A.
Related questions
A rule counting sign changes to bound the number of positive real zeros belongs to:A single point where a rational graph is undefined, shown by an open circle, is a hole or A horizontal line that a graph approaches as inputs grow without bound is a horizontal:A vertical line that a graph rushes towards but never crosses is a vertical:A polynomial with real coefficients has 2 plus 3i as a zero, so it must also have as a zerFor a rational zero, numerators come from factors of the constant term and denominators frA polynomial takes a negative value at 3 and a positive value at 4, so between them it musA graph crosses straight through the x-axis at a zero. That zero has multiplicity that is: