1. Supplementary angles : Two angles are supplementary if their sum is 180°.
For angle 1 and ∠COF to be supplementary,
∠1 + ∠COF =180°
must be satisfied.
We see in the figure that angle 1 and COF form a straight line.
The angle of a straight line is 180°.
∴ 1 is a supplement of ∠COF.
Answer : YES
2. Given : ∠COF =150° ;
AD is perpendicular to BF.
Here, ∠BOC + ∠COF = 180° , since they form a straight line.
∠BOC = 180° - ∠COF = 180° - 150° =30°
∴ ∠BOC = 30°
Answer : D. 30°
Human activities
The extinction is still happening right now and is called the holocene extinction
It is true indeed. Hit that thanks button if this helped. C:
Well it’s simply because dinosaurs went extinct 65 years ago so if you were to find a dinosaur fossil, it would be 65 years old or more, not less.
Labor is usually described as hard, physical work. The best answer would be C. work for which people get paid.
