Some students are making solid figures with 1-inch unit cubes. Brittany is making a cube. She builds the first two layers of the
cube as shown. How many 1-inch unit cubes does Brittany need in all to make her cube? Explain how you found your answer.
1 answer:
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(x + 5) (x - 2) (x - 3)
Answer:
Option A. (-1, 0)
Step-by-step explanation:
In the figure attached,
Circle O is a unit circle (having radius r = 1 unit)
If a point A with central angles = θ, is lying on the circle then the coordinates of the point A will be,
x = r.cosθ
x = 1.cosθ = cosθ
and y = r.sinθ
y = 1.sinθ = sinθ
Therefore, coordinates representing the point A will be (cosθ, sinθ).
As per question the given point A is lying at P (a point having central angle θ = 180°)
Coordinates of point P will be
(x', y') → (cos180°, sin180°)
→ (-1, 0)
Therefore, Option A will be the answer.
