Answer:

Step-by-step explanation:
A rectangular prism (or orthohedron) is a polyhedron whose surface is formed by two equal and parallel rectangles called bases and by four lateral faces that are also parallel rectangles and equal two to two.
The orthohedron is a straight prism and also a particular case of irregular quadrangular prism.
In a rectangular prism you can differentiate the following elements:
Bases: are two parallel and equal rectangles.
Faces: the four rectangles of the lateral faces and the two bases. Therefore, it has six faces.
Height : distance between the two bases of the prism. The height h coincides with any of the edges of the lateral faces.
Vertices: the eight points where three faces of the prism converge.
Edges: segments where two faces of the prism are found.
The surface area of the rectangular prism (or orthohedron) is calculated by the following formula:
where w is width, l is length, and h is height.
Solving with l = 15mm, w = 3mm, and h = 4mm
![A=2[(3mm)(4mm)+(15mm)(3mm)+(15mm)(4mm)]](https://tex.z-dn.net/?f=A%3D2%5B%283mm%29%284mm%29%2B%2815mm%29%283mm%29%2B%2815mm%29%284mm%29%5D)

The sum of the adjacent angles of a parallelogram is equal to 180° . Let the adjacent angle be x . The opposite angles of a parallelogram are equal. Therefore, rest of the angles are 40°, 140° and 140°.
4/9 , 2/3, 1/6, ....-2 1/2 = - 5/2
common denominator is 18
Answer:
b. f(x) = -3(x+1)^2+2
Step-by-step explanation:
i hope this helps :)
Answer:
45° and 12
Step-by-step explanation:
The sum of the exterior angles of a polygon = 360°
(8)
The polygon has n = 8, that is 8 exterior angles, thus
exterior angle = 360° ÷ 8 = 45°
(9)
The number of sides n is
n = 360 ÷ 30 = 12