What is the formula for a triangles area?

Answer 1

The formula for the area of a triangle is:

1/2 bx h

= half of the base of the triangles the height

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Answer 2

The formula for area is depending on the shape

Triangle

Area = ½ × b × h

b = base

h = vertical height Square

Area = a2

a = length of side

Rectangle

Area = w × h

w = width

h = height Parallelogram

Area = b × h

b = base

h = vertical height

Trapezoid (US)

Trapezium (UK)

Area = ½(a+b) × h

h = vertical height Circle

Area = π × r2

Circumference = 2 × π × r

r = radius

Ellipse

Area = πab

Sector

Area = ½ × r2 × θ

r = radius

θ = angle in radians

Answer 3

"Rectangular" and "triangle" are words that refer to shapes in 2-dimensions - ie plane shapes. Although they can be used to describe 3-dimensional shapes, it can give rise to ambiguity. In this case, it is not clear whether you mean a triangular prism or a rectangle based pyramid.

The triangular prism is the more likely shape. In that case, the volume is the cross section area of the triangle times the length of the prism.

Answer 4

There are many different formulae, which you must learn separately. For example, for a rectangle, multiply length x width.

Answer 5

1/3 x base(which is length x width) x height

Answer 6

A triangle is a plane figure and as such has no volume

Answer 7

you multiply the length of the base times the height and then divide by two.

Answer 8

it is 1/2 x height x base