Isosceles
Isosceles triangle
60 cm2
Let x be the length of one of the congruent sides, then the three sides are x, x, 3x. Perimeter = x + x + 3x = 5x = 75cm => x = 15cm Thus the three sides are 15cm, 15cm, 45cm.
It could be 377.0 cm or 383.3 cm depending on which two adjacent sides.
25
Length of a side of an equilateral triangle : Perimeter = 1 : 3 For example, if the length of the sides of an equilateral triangle were 5cm each, then perimeter would be three times that much - 15cm. 5 : 15 is the same as 1 : 3 when simplified. Length of a side of an equilateral triangle : Perimeter = 1 : 3 For example, if the length of the sides of an equilateral triangle were 5cm each, then perimeter would be three times that much - 15cm. 5 : 15 is the same as 1 : 3 when simplified.
Yes
A triangle with side a: 8, side b: 11, and side c: 15 cm has an area of 42.85 square cm.
No. 7 squared plus 11 squared does not equal 15 squared.
60 cm2
Let x be the length of one of the congruent sides, then the three sides are x, x, 3x. Perimeter = x + x + 3x = 5x = 75cm => x = 15cm Thus the three sides are 15cm, 15cm, 45cm.
It could be 377.0 cm or 383.3 cm depending on which two adjacent sides.
40mm - 15cm = 25
Using Pythagoras' theorem: 15 times the square root of 2 cm in length
25
Well, assuming it doesn't have any other sides, it's a scalene triangle.
No. The sum of the lengths of any two sides of a triangle must be greater that the third. Here 6 + 9 = 15, not > 15.
The largest angle will be opposite the longest side which is 11cm and by using the cosine rule the largest angle works out as 97.09 degrees rounded to two decimal places.