Question

A triangle has side lengths of 13 cm 6 mm, 8 cm 9mm, and 7 cm.

*What is the perimeter of the triangle in cm and mm?

*What is the perimeter of the triangle in cm only?

*What is the perimeter of the triangle in mm only?

Answer 1

Perimeter = side + side + side

  13 cm, 6 mm
+  8 cm, 9 mm
    7 cm, 0 mm
--------------------
  29 cm. 5 mm

a.) 29 cm. 5 mm.
b.) 29.5 cm.
c.) 295 mm.

Answer 2

The perimeter formula for a triangle is just P=a+b+c

If a=13.6 cm, b=8.9cm, c=7cm then

P=13.6+8.9+7 (cm) or 136+89+70 (mm)
P=29.5 cm or 295 mm or 29 cm 5 mm

a) 29 cm 5 mm b) 29.5 cm c) 295 mm