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area of sector = (angle at centre*area of circle)/360

Q: What is the formula used to find the area of a sector?

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Area of what? Every geometrical shape has a different formula to find its area. The simplest one: to find the area of a rectangle whose edge lengths are h and w, area = h*w.

Base x height for the area oF a rectangle(sometimes written as length x width). 1/2 x base x height for a triangle.

It is the formula used in finding the area of a circle which is pi times radius squared

D2x0.785

(pi)R2 is the formula for the area of a circle. It won't help you find the volumeof a half sphere, at least not without some calculus.What you need is the formula for the volume of a sphere: V = 4/3 pi R3 .Do I have to explain that the volume of a half sphere is just half of that ?

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The answer depends on the formula for what: the radius, circumference, length of an arc, area, area of sector, area of segment: each one has a different formula.

It is area

In the formula for the rectangle, put the width equal to the length.

Area = (pi) (R)2

Area of what? Every geometrical shape has a different formula to find its area. The simplest one: to find the area of a rectangle whose edge lengths are h and w, area = h*w.

area= bash X height / by 2

Area = ( length of a side)2

The formula used to find force is F = m * a, where F is the force, m is the mass of the object, and a is the acceleration.

1/2(bh)

The formula for the area of a square is simply L2 (sometimes referred to as s2 ) where L (s) is the length of one side. The formula for the area of a rectangle is LW, where L is the length and W is the width. The formula for the area of a rectangle can be used to find the area of a square, but the formula for the area of a square cannot be used to find the area of a rectangle. This is because by definition, all squares are rectangles, but not all rectangles are squares.

If you want to ask questions about "this formula", may I suggest that you ensure that there is "this formula" in the question?

There are different formulae for different shapes.