Which side of angle measures could be the interior angles of a triangle?
a) 90°, 90°, 90°
b) 80°, 80°, 200°
c) 40°, 50°, 60°
d) 15°, 30°, 135°

The sum of all the angles of a triangle is 180 degrees.

If you add 90 + 90 + 90 together you get 270. These can not be the angle measures of interior angles of a triangle because the sum is more then 180.

If you add 80 + 80 + 200 together you get 360. These can not be the angle measures of interior angles of a triangle because the sum is more then 180.

If you add 40 + 50 + 60 together you get 150. These can not be the angle measures of interior angles of a triangle because the sum is less then 180.

If you add 15 +30 + 135 together you get 180! This set of angle measures can the be interior angles of a triangle!

Hope this helped!

~Just a girl in love with Shawn Mendes

594 square inches

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