Please help!!! Use an algebraic equation to solve the problem. The sides of a triangle are in the ratio 3 : 4 : 5. What is the l
ength of each side if the perimeter of the triangle is 90 cm? A. 22.5 cm, 30 cm, and 37.5 cm
B. 7.5 cm, 11.5 cm, and 32.1 cm
C. 10.5 cm, 11.5 cm, and 12.5 cm
D. 19.3 cm, 25.7 cm, and 32.1 cm
To find the perimeter of a triangle, all the sides are added together:
A + B + C = Perimeter
Knowing the ratio of the sides, all the sides can be multiplied by a common factor, for the ratio to stay the same. Adding up these factors, setting it equal to a perimeter of 90, and solving:
Step-by-step explanation: a triangle has a total of 180 degrees, and the number of sides determine the number of angles it has. in this case, it's an equilateral triangle. 180/3 = 60. all triangles have 3 sides if you didn't know that ;)
