129 degrees you just add DCE and ECF together
Answer:
sin X
Step-by-step explanation:
sin X = 
= 
= 
Answer: 8
Step-by-step explanation: if you count the angels and the sides then you'll get the answer 8..
To answer this you must have 1/4 of tank which is 5 gallons then add 10 to get 15 gallons
Answer:
Step-by-step explanation:
Before giving the exterior angles, find the third angle. A triangle (all triangles) measure 180 degrees.
35 + 80 + x = 180
115 + x = 180
x = 180 - 115
x = 65
Exterior angles are supplements of the interior angles.
So the exterior angle to 65 degrees is 180 - 65 = 115
And the exterior angle to 35 degrees is 180-35 = 145
The exterior angle to 80 degrees is 180 - 100 = 80
