Find the largest angle of the triangle ABC. a= 2, b= 4, c= 2√7

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter9: Quadratic Functions And Equations
Section9.5: Solving Quadratic Equations By Completing The Square
Problem 30PPS
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Find the largest angle of the triangle ABC. a= 2, b= 4, c= 2√7

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