What is the area of triangle with vertices P(1,1), Q(-1,2), R(2,-1)? Group of answer choices 6 3/2 5/2 3

Elementary Geometry For College Students, 7e
7th Edition
ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
ChapterP: Preliminary Concepts
SectionP.CT: Test
Problem 1CT
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What is the area of triangle with vertices P(1,1), Q(-1,2), R(2,-1)?
Group of answer choices
6
3/2
5/2
3
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