## How do u find the surface area of a triangle?

To find the area of a triangle, multiply the base by the height, and then divide by 2.

The division by 2 comes from the fact that a parallelogram can be divided into 2 triangles.

For example, in the diagram to the left, the area of each triangle is equal to one-half the area of the parallelogram.

## What is the formula for surface area?

We can also label the length (l), width (w), and height (h) of the prism and use the formula, SA=2lw+2lh+2hw, to find the surface area.

## What is the formula for the total surface area of a triangular prism?

Next, multiply the base times height for the area of the triangles (bh) and add the three sides of the triangle (s1 + s2 + s3). Then, multiply the sum of the triangle sides by the height of the prism (H) and add the values together for the answer, making sure to include the appropriate unit of measurement.

## How do you find the surface area of a triangular pyramid?

To find the surface area of a regular triangular pyramid, we use the formula SA = A + (3/2)bh, where A = the area of the pyramid’s base, b = the base of one of the faces, and h = height of one of the faces.

## What is the formula for finding the area of an isosceles triangle?

To find the area of an isosceles triangle using the lengths of the sides, label the lengths of each side, the base, and the height if it’s provided. Then, use the equation Area = ½ base times height to find the area.

## What are the formulas for triangles?

Right Triangle

Right Triangle | |
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A triangle with one right angle. C = A + B = Pi/2 radians = 90o c2 = a2 + b2 (Pythagorean Theorem) | |

P = a + b + c s = (a+b+c)/2 K = ab/2 ha = b hb = a hc = ab/c ma = sqrt(4b2+a2)/2 mb = sqrt(4a2+b2)/2 mc = c/2 |

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## How do u find the surface area of a sphere?

Surface Area of a Sphere –

## How do you find the total surface area of a cube?

A cube has 6 faces. The area of each face is found by squaring the length of the side. Multiply the area of one face by the number of faces to get the total surface area of the cube.

## How do you find the surface area of a rectangle?

The formula to find the surface area of a rectangular prism is A = 2wl + 2lh + 2hw, where w is the width, the l is the length, and the h is the height.