Question 898334
Let {{{ alpha }}} = angle 2
{{{ 3*alpha }}} = angle 1
{{{ 5*alpha - 90 }}} = angle 3
----------------------------
Do you mean the 3 angles add up to 180 degrees?
If so,
{{{ alpha + 3*alpha + 5*alpha - 90 = 180 }}}
{{{ 9*alpha - 90 = 180 }}}
{{{ 9*alpha = 270 }}}
{{{ alpha = 30 }}}
-------------------
Angle 2 = 30 degrees
----------------------
Angle 1 = {{{ 3*30 }}}
Angle 1 = 90 degrees
----------------------
Angle 3 = {{{ 5*30 - 90 }}}
Angle 3 = {{{ 150 - 90 }}}
Angle 3 = 60 degrees
----------------------
check:
{{{ 30 + 90 + 60 = 180 }}} degrees
OK