Question

Alma is finding the measures of the angles in a triangle that have the ratio 1:3:5. circle her mistake and correct it

x + 3x +5x = 180
8x = 180
x = 22.5

Answer 1

error in summing terms in x

Explanation:

x + 3x + 5x = 180 ( collect like terms on left )

9x = 180 ← ( 9x not 8x )

divide both sides by 9

x = 20