3. A cord of a circle subtends an angle of radians at the centre of the circle. The area
of the minor segment cut off by the cord is one eighth of the area of the circle.
Prove that 40 = 1 + 4sin 0. Make a sketch to help you show this proof.

Which pair of angles are vertical angles? ∠1 and ∠4 ∠1 and ∠2 ∠2 and ∠4 ∠2 and ∠3

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?