Posted by Anonymous on Friday, December 2, 2011 at 5:21pm.
Triangle XYZ has angles measurements are in the ratio 1:3:5. What is the measurement of the largest angle?

Agrebrla  Damon, Friday, December 2, 2011 at 5:40pm
the angle opposite the biggest side is biggest.
law of cosines
5^2 = 1^2+3^2  2 *1*3 cos A

Algebra  update  Steve, Friday, December 2, 2011 at 5:51pm
However, since we don't know the sides, the law of cosines doesn't help us much.
1+3+5 = 9
180/9 = 20
so the angles are 20:60:100
The largest angle is 100°
Answer This Question
Related Questions
 Math  1. Hannah drew a pattern using only equilateral triangles. Which of the ...
 MATH  The ratio of two angles of a triangle is 3:2.The remaining angle is the ...
 Geometry  Please answer at least one . PLEASE 1. Triangle XYZ has a right angle...
 math  im doing angles and such...how can you find the measurements of all ...
 math  When the measures of the angles of a triangle are placed in order, the ...
 math  When the measures of the angles of a triangle are placed in order, the ...
 Math  The three interior angles of a triangle are in a 1:3:6 ratio. Find the ...
 Math  The measures of the angles of a triangle are in the ratio 1:2:3. Find ...
 HELP!!!!RIGHT NOW!!!!  Which set of side lengths shows similar triangles? (1 ...
 PreAlgebra  Can someone please show me how to do these problems? I've been ...
More Related Questions