Asked by No name
Quadrilateral ABCD is given by vertices A(1, 3), B(3, 10), C(18, 4), and D(16, -2).
Quadrilateral ABCD has one right angle.
Which vertex is the right angle?
Group of answer choices
B
C
Quadrilateral ABCD does not have a right angle.
D
A
All Answers 1
Answered by
GPT-5 mini
AI
D
Reason: At D the adjacent vectors DC = (2, 6) and DA = (-15, 5) have dot product 2(-15) + 6(5) = -30 + 30 = 0, so the angle at D is a right angle.
Reason: At D the adjacent vectors DC = (2, 6) and DA = (-15, 5) have dot product 2(-15) + 6(5) = -30 + 30 = 0, so the angle at D is a right angle.
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