In surface area questions, we need to know all three side lengths of the triangle however we only need the base and the height to calculate the area of the triangle. Using the wrong measurements to work out the area of the triangle faces.To find surface area, work out the area of each face and add them together 3) Use the formula: Perimeter of Base X Height. Volume and surface area are different things – volume tells us the space within the shape whereas surface area is the total area of the faces. To find the surface area of a prism, follow the 5 steps: 1) Determine the height of the prism. Calculating volume instead of surface area.Now, if the spherical ball is divided into two equal parts, then we need to find the lateral area for the hemisphere. Hence, the lateral area of the spherical ball is 3215.36 square centimeters. ![]() You can’t have some measurements in cm and some in mīe careful to apply the correct prism related formula to the correct question type. Lateral area of sphere 4r (2) Substituting the value of ‘r’ and 3.14 for in the formula, Lateral area 4 x 3.14 x (16) (2) 3215.36. ![]() You need to make sure all measurements are in the same units before calculating volume.Į.g. Surface area is measured in units squared (e.g. You should always include units in your answer. Step-by-step guide: Surface area of a triangular prism Since it is an area, surface area is measured in square units (e.g. The triangular faces of a triangular prism are congruent (exactly the same) but, unless the triangle is an isosceles triangle or an equilateral triangle, the rectangles are all different. ![]() The lateral surface area is the total area of the rectangular sides For a triangular prism the top and the base are triangles and the lateral faces are rectangular sides. Lateral faces are all of the faces of an object excluding the top and the base. To work out the surface area of a triangular prism, we need to work out the area of each face and add them all together. The Surface Area of a Triangular Prism Formula can be calculated by summing the areas of the triangular base, the two rectangular faces, and the product of the perimeter of the triangular base and the height. The surface area of a triangular prism is the total area of all of the faces.
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