me678120
me678120 me678120
  • 11-05-2021
  • Mathematics
contestada

please bootiful people help this nonsmart person

please bootiful people help this nonsmart person class=

Respuesta :

okwudilichukwuoc
okwudilichukwuoc okwudilichukwuoc
  • 12-05-2021

Answer:

9

Step-by-step explanation:

the triangle is right angle.

at right angle it makes 90°. therefore;

(3d+1)°+(6d+8)°=90°

3d+1°+6d+8°=90°

9d+9°=90°.

9d=90°-9°

9d=81°

d=81/9

d=9°

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