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#37409

linear equations

angles

medium

75 sec

Lines $r$ and $s$ are parallel, and they are intersected by a transversal line $t$ . One of the eight angles formed at the intersections has a measure of $7 0^{\circ}$ . What is the sum of the measures of all the obtuse angles formed by the intersection of lines $r$ , $s$ , and $t$ ?

• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-).
• Fractions must be in lowest terms.
• Mixed numbers must be converted to improper fractions.