### Home > GC > Chapter 5 > Lesson 5.3.5 > Problem 5-122

5-122.

Find the area and perimeter of

Separate .

Label the new point

*, creating*

Both of the triangles that have been created are special right triangles, because the height creates two right triangles: a

Refer to the Math Notes box below to find the lengths of the unknown sides.

Then use this information to find the area and perimeter of the original triangle.