Two sides of a triangle have the same length. The third sido measures 7 m less than twice the common length. The perimeter of the triangle is 17 m. What are the lengths of the three sides?

  6 m, 6 m, 5 m

Step-by-step explanation:

If x is the common length then the perimeter is the sum of side lengths:

  x + x + (2x-7) = 17

  4x = 24 . . . . . . . . . add 7

  x = 6 . . . . . . . . . . divide by 4

  2x -7 = 12 -7 = 5 . . . find the length of the 3rd side

The side lengths are 6 m, 6 m, and 5 m.

sas (side angle side)

aa (angle angle)

sss(side side side)

sas find two sides with an angle in between

aa is finding two angles and the third will add up to 180

sss find all sides

step-by-step explanation: