Such special properties of the isosceles triangle help us to calculate its area as well as its altitude with the help of the isosceles triangle formulas.Īrea of an Isosceles Triangle: It is the space occupied by the triangle. Thus, in an isosceles triangle, the altitude is perpendicular from the vertex which is common to the equal sides. What Are the Isosceles Triangles Formulas?Īn isosceles triangle has two sides of equal length and two equal sides join at the same angle to the base i.e. The two important formulas for isosceles triangles are the area of a triangle and the perimeter of a triangle. Various formulas for isosceles triangles are explained below. The two angles opposite to the equal sides are equal and are always acute. The isosceles triangle has a base ABC |AB| = 16 cm and a 10 cm long arm.In geometry, an isosceles triangle is a triangle having two sides of equal length. Calculate the length of the arm of a given triangle.įind the area of an isosceles trapezoid if the bases are 12 cm and 20 cm, the arm's length is 16 cm.Ĭalculate the length of the arm r of isosceles triangle ABC, with base |AB| = 14 cm and a height v=18 cm. In an isosceles triangle with a circumference of 36 cm, the height at the base is 12 cm long. Calculate its height-the result round to tenths.
In the isosceles trapezoid ABCD, the base length is a = 10cm, c = 6cm, and the arm's length is 4cm.
One has a 17 cm long arm and a 10 cm long base. Two isosceles triangles have the same angle at the apex concerning the base. What are the angles of an isosceles triangle ABC if its base is long a=5 m and has an arm b=4 m? Calculate the base x of an isosceles triangle.Ĭalculate the area of an isosceles trapezoid whose bases are at a ratio of 5:3. If the center of gravity is T, find the area of the triangle ABT.Īn equilateral triangle with a side 16 cm has the same perimeter as an isosceles triangle with an arm of 23 cm. In the isosceles triangle ABC is the ratio of the lengths of AB and the height to AB 10:12. Calculate the length of the arm of a given triangle. In an isosceles triangle with a circumference of 36 cm, the height at the base is 12 cm. Determine the area of the triangle if the circumference is 22 cm. In an isosceles triangle, the length of the base is equal to 75% of the arm's length. What is the perimeter of this triangle?Ĭalculate the perimeter of the isosceles triangle with arm length 73 cm and base length of 48 cm.Ĭalculate the length of the base of an isosceles triangle with a circumference 224 cm if the arm length is 68 cm. Find the lengths of the trapezoidal sides.Ĭalculate the size of the base of an isosceles triangle, the height is 5 cm, and the arm's length is 6.5 cm. The arm's length is one-third of the length of the longer base. The difference in the length of the bases is 6 cm. The circumference of the isosceles trapezoid is 34 cm. In an isosceles triangle, the arm's length and the length of the base are in a ratio of 3 to 5. We encourage you to watch this tutorial video on this math problem: video1 Related math problems and questions:
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