The area of a regular pentagon is equal to 1.720a (where a= the length of a side), so multiply that by length for volume of a regular prism, or for area, multiply it by 2 and add (5 times [a * L]), where L is the length.
In the case of an irregular pentagonal prism, divide [...]
I have a perimeter and area test on Wednesday and I need to memorize the formulas for these shapes:
Rectangle:
Perimeter: (Base + Height) x 2
Area: Base x Height
Square:
Perimeter: side x 4
Area: side x side
Triangle:
Perimeter: Add 3 sides
Area: 1/2 x base x height
Parallelogram:
Perimeter: (Base + Slant Height) x 2
Area: Base x Height
Circle:
Perimeter: pi x diameter
Area: pi x [...]
I’m to lazy to find them myself, Bwahahaha!
What’s base?
V = Area of base * Height
= π r² h
SA = 2 π r h + 2 π r²
Area of the base, if your talking about a circular cylinder is a circle (area = π r², where r = radius of circle) if you’re looking at a [...]
Given the radius (r) and the amount of sides (s) a polygon has would area = (s*r^2*sin(360/s))/2 and would the perimeter = 2*r*s*sin(360/s)?
Your question needs more information before we can do anything. First, radius doesn’t really apply to polygons. You may be referring to a regular polygon inscribed in a circle or a [...]
also what is the relationship between them?
The circumference of a circle is 2pir
A central angle, x, is an angle between two radii.
The arc intercepted by the central angle will have a length equal to x/360 *2pir = pirx/180 if x is measured in degrees.
One radian = 180/pi degrees. So if x is measured in [...]
i need to know how the formula for finding the area of figures originated.
The first area to be defined was the obvious one of a rectangle. The number of squares of unit size that would fill up a rectangle is clearly the number of such squares that fit in a row across one dimension [...]
Parallelogram: A=bh
Triangle: A=1/2 bh
Trapezoid: A=1/2(b1+b2)h
The area formula for a rectangle is A=bh. Explain thoroughly how the three formulas are derived from the area formula from a rectangle.
the area of a rectangle is A = bh, the base time the height.
The Parallelogram is the same as the Rectangle, as a Parallelogram is a rectangle with part [...]
Find the area of a triangle and show your works. The triangle has following formulas:
y=3x-1
y=1/2x-2
y=-4x+5
That’s a LONG problem. I can explain what you need to do, step by step.
1. Find the points of intersection of the lines (this will give you the 3 vertices of your triangle). To do that, take the equations [...]
I have this huge math assignment and I need the following surface area formulas of:
-cylinders.
-rectangular prisms.
-right circular cones.
-square pyramids.
This is probably a very dumb question, but I never took the time to memorize it before, and now I need it.
Thankyou. (:
Surface Area of a Cylinder = 2 π r ² + 2 π r h
Surface [...]
tetrahedron is just a special pyramid (made up of 4 congruent equilateral triangles):
V = Base area * height / 3, which I think would be S^3√6 / 24 (I just derived that on the back of an envelope, so I am not guaranteeing my answer tonight!)
Total Area = 4 equilateral triangles = 4*S²√3/4 = S²√3
I [...]
