Question

The sides of a triangle are 5.2cm, 6.3cm and 9.4cm, each correct to nearest millimeter. Calculate the lower bound of perimeter of the triangle.

Answer 1

Answer:20.75

Step-by-step explanation:

1cm=10mm

so:1mm=0.1cm

0.1/2=0.05

if it asks lower bound:

5.2-0.05=5.15 +

6.3-0.05=6.25 +

9.4-0.05=9.35

————

20.75

Answer 2

Answer:

20.75

Step-by-step explanation:

So if 1cm = 10mm

then 1mm = 0.1cm

0.1 / 2 = 0.05

To find the lower bound:

5.2 - 0.05 = 5.15

6.3 - 0.05 = 6.25

9.4 - 0.05 = 9.35

5.15 + 6.25 + 9.35 = 20.75