geometry
posted by Anonymous .
In triangle ABC,
• AB is x cm long
• BC is twice the length of AB
• AC is 10 cm longer than AB.
The perimeter of the triangle is 42 cm.
Write down an equation in x and solve it.
Use your answer to find the lengths of the sides of the triangle.

BC=2x
Ac=x+10
permiter=42=x+2x + 10+x
solve for x
Respond to this Question
Similar Questions

yet another geometry question
Points D, E and F are the midpoints of the sides of triangle ABC. If AD=6, CF=4 and the perimeter of triangle ABC = 30, then find BE. If D is between A&B, E is between B&C and F is between C&A, then the perimeter is 6+6+4+4 + (twice … 
Algebra
The perimeter of an equilateral triangle is 7 in. more than the perimeter of a square. The side of the triangle is 5 in. longer than the side of the square. Find the length of each side of the triangle. (Note: An equilateral triangle … 
geometry
In triangle ABC, if line BC is one inch longer than line AB, line AC is 10 inches shorter than the sum of line BC and line AB , and the perimeter of triangle ABC is 72 inches, find the length of line BC? 
geometry
Triangle ABC is a right triangle such that m angle B= 90 degrees. If AC= 12 and BC=9, what is the perimeter of triangle ABC ? 
pre algebra
The perimeter of a triangle is 24 cm. One side is 2 cm longer than the shortest side. The longest side is 2 cm less than twice the length of the shortest side. Find the length of each side of the triangle. write equation and solve. 
algebra
the length of a rectangle is twice its width w. A second triangle, which is 8cm longer and 3 cm narrower than the first triangle, has a perimeter 154 cm. What is the dimension of each triangle. 
Trig
Its a 306090 triangle there's a line in the center that= 10 a. What is the length of the hypotenuse of triangle ABC? 
Math (Geometry)
The perimeter of right triangle ABC is equal to the perimeter of isosceles triangle DEF. The lengths of the legs of the right triangle are 6 and 8. If the length of each side of the isosceles triangle is an integer, what is the greatest … 
geometry
triangle abc is similar to def, the lengths of the sides of triangle abc is 5,8,11. what is the length of the shortest side of triangle def if its perimeter is 60? 
Centroids and Triangles  determining perimeter?
Let G denote the centroid of triangle ABC. If triangle ABG is equilateral with side length 2, then determine the perimeter of triangle ABC. I drew the diagram, but it doesn't really help....