The funnel has the shape of an equilateral cone. Calculate its area.Ĭalculate the area of an equilateral triangle with a circumference of 72cm.Īn equilateral triangle has a perimeter 36 dm. The equilateral triangle has a 23 cm long side. The semicircle with center S and the diameter AB is constructed equilateral triangle SBC. What is the 10th triangular number? Help: A triangular number or triangle number counts objects arranged in an equilateral triangle. The first four triangular numbers are 1,3,6,10. What is the area of an equilateral triangle with a circumference of 63 cm?Ĭalculate an equilateral triangle's perimeter and area with a side of 20 dm. The perimeter of an equilateral triangle is 33cm. If you know the height (h) of an equilateral triangle, you can use that information to find the length of one side (a) using this formula:Īn equilateral triangle in word problems in mathematics:Ĭan an equilateral triangle have a right angle?Ĭalculate the length of a side of the equilateral triangle with an area of 50cm².įind the area of an equilateral triangle with a side of 15 cm.Ĭalculate the height of the equilateral triangle if its perimeter is 48. You can also use the area to find the height (h) or inradius (r) of the triangle: If you know the area of an equilateral triangle, you can use that information to find the length of one side (a) using this formula: You can also use the side length to find the height (h) or the inradius (r) of the triangle: You can also use the side length to find the area of the triangle using the formula: If you know the length of one side of an equilateral triangle (a), you can use that information to find the perimeter (p) of the triangle: p = 3a An equilateral triangle is a triangle where all three sides have the same length, and all three angles are also congruent and measure 60 degrees each.
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