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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

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter8: Areas Of Polygons And Circles

Section8.4: Cicumference And Area Of A Cicle

Problem 18E: A rectangle has an area of 36 in2. What is the limit smallest possible value of the perimeter of the...

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Question

What is the area of triangle with vertices P(1,1), Q(-1,2), R(2,-1)?

Group of answer choices

3/2

5/2

Polygon with three sides, three angles, and three vertices. Based on the properties of each side, the types of triangles are scalene (triangle with three three different lengths and three different angles), isosceles (angle with two equal sides and two equal angles), and equilateral (three equal sides and three angles of 60°). The types of angles are acute (less than 90°); obtuse (greater than 90°); and right (90°).

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