One of the exterior angle
of a triangle is 135° and
the interior opposite
angles are in the ratio
4:5, then th

1 thought on “One of the exterior angle<br />of a triangle is 135° and<br />the interior opposite<br />angles are in the ratio<br />4:5, then th”

1. Ratio of interior opposite angles = 4:5

   Exterior angle = 135°

   Let the common part be x

   4x + 5x = 135°

   9x = 135°

   x = 135 ÷ 9

   = 15°

   4x = 4 × 15

   = 60°

   5x = 5 × 15

   = 75°

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