Question

Finding the perimeter of a similar triangle???

Answer 1

Yes? Any specific problem?

Answer 2

Generally, the ratio of two similar corresponding sides is also the ratio of the perimeters. Use that fact to your advantage!

Answer 3

Similar triangles are related by a scale factor.
The scale factor is applied to the lengths of the sides, so it is a linear scale factor.
Since the perimeter of a triangle is a linear quantity, the same scale factor that applies to the lengths of the sides also applies to the perimeters.

Answer 4

So what would I do in this case?

Answer 5

Mathstudent gave an extensive explanation! All right, that should be enough.

Answer 6

Calculate the ratio of any two corresponding sides. Then find the perimeter of any one triangle.

Answer 7

ok..in similar triangles..sides opposite to the equal angles in both the triangles are proportional..there is enough data to find the proportion...knowing it..and given that one triangle has all sides known...find the lenght of the unknown side..then u know how to find the perimeter

Answer 8

There are two ways to go about here.
1. Find the scale factor of the two triangles by comparing the given lengths of 2 corresponding sides. Then find the length of the missing side of triangle ABC. Then add all lengths and there is your perimeter.
2. Find the scale factor of the two triangles by comparing the given lengths of 2 corresponding sides. Then use the scale factor and the perimeter of triagle PQR to find the perimeter of triangle ABC.

The second method requires less work.

Answer 9

is the perimeter unknown side 15-- perimeter 70?

Answer 10

Correct.

Answer 11

yo