An equilateral triangle has 3 equal interior angles each of 60 degrees. There are two right angled triangles in an equilateral triangle. So we can use trigonometry to find the length of one side of the equilateral triangle then multiply this by 3 to find its perimeter. Hypotenuse (which is one side of the equilateral) = 15/sin 60 degrees = 17.32050808 17.32050808 x 3 = 51.96152423 Perimeter = 51.96152423 units.
Chat with our AI personalities
the height is 4.33 units cos 30 = .866 15 / 3 = 5 5 x .866 = 4.33
To find the altitude of a triangle, we can use the formula: area = 0.5 * base * altitude. Given that the area is 45 cm² and the base is 15 cm, we can plug these values into the formula: 45 = 0.5 * 15 * altitude. Solving for altitude, we get altitude = 45 / (0.5 * 15) = 45 / 7.5 = 6 cm. Therefore, the altitude of the triangle is 6 cm.
49.5 units
Perimeter: 8+15+17 = 40 cm Area: 0.5*8*15 = 60 square cm
Is it a doll's house? Perimeter = 9+9+15+15 = 48mm