To calculate the area of the equilateral triangle, we need to know the measurement of its sides. The perpendicular drawn from the vertex of the triangle to the base divides the base into two equal parts. The formula that is used in this case is:Īrea of a Right Triangle = A = 1/2 × Base × Height Area of an Equilateral TriangleĪn equilateral triangle is a triangle where all the sides are equal. Therefore, the height of the triangle is the length of the perpendicular side. Area of a Right-Angled TriangleĪ right-angled triangle, also called a right triangle, has one angle equal to 90° and the other two acute angles sum up to 90°. The area of triangle formulas for all the different types of triangles like the equilateral triangle, right-angled triangle, and isosceles triangle are given below. The area of a triangle can be calculated using various formulas depending upon the type of triangle and the given dimensions. Let us learn about the other ways that are used to find the area of triangles with different scenarios and parameters. They can be scalene, isosceles, or equilateral triangles when classified based on their sides. Triangles can be classified based on their angles as acute, obtuse, or right triangles. Solution: Using the formula: Area of a Triangle, A = 1/2 × b × h = 1/2 × 4 × 2 = 4 cm 2 Let us find the area of a triangle using this formula.Įxample: What is the area of a triangle with base 'b' = 2 cm and height 'h' = 4 cm? Observe the following figure to see the base and height of a triangle. However, the basic formula that is used to find the area of a triangle is: Trigonometric functions are also used to find the area of a triangle when we know two sides and the angle formed between them. For example, Heron’s formula is used to calculate the triangle’s area, when we know the length of all three sides. 544 square units.The area of a triangle can be calculated using various formulas. So the surface area of this figure is 544. So one plus nine is ten, plus eight is 18, plus six is 24, and then you have two plus two plus one is five. To open it up into this net because we can make sure We get the surface area for the entire figure. And then you have thisīase that comes in at 168. You can say, side panels, 140 plus 140, that's 280. 12 times 12 is 144 plus another 24, so it's 168. Region right over here, which is this area, which is Just have to figure out the area of I guess you can say the base of the figure, so this whole And so the area of each of these 14 times 10, they are 140 square units. Now we can think about the areas of I guess you can consider It would be this backside right over here, but You can't see it in this figure, but if it was transparent, if it was transparent, So that's going to be 48 square units, and up here is the exact same thing. Thing as six times eight, which is equal to 48 whatever Here is going to be one half times the base, so times 12, times the height, times eight. Of this, right over here? Well in the net, thatĬorresponds to this area, it's a triangle, it has a base So what's first of all the surface area, what's the surface area We can just figure out the surface area of each of these regions. So the surface area of this figure, when we open that up, And when you open it up, it's much easier to figure out the surface area. So if you were to open it up, it would open up into something like this. Where I'm drawing this red, and also right over hereĪnd right over there, and right over there and also in the back where you can't see just now, it would open up into something like this. It was made out of cardboard, and if you were to cut it, if you were to cut it right Video is get some practice finding surface areas of figures by opening them up intoĪbout it is if you had a figure like this, and if
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