Calculate the perimeter of an equilateral triangle of side 3cm

P=9cm

Step-by-step explanation:

When the triangle is equilateral, it means that all sides are equal. In this case, all three sides are 3cm.

The equation to find the perimeter for a triangle is just to add all sides.

This becomes:

3+3+3=9.

So, in conclusion, the perimeter of this equilateral triangle is 9cm.

Hope this helps, and have a nice day:)

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest