Question

isosceles and equilateral triangles
find all angles
find the measure of the two base angles
find the measure of all sides if the perimeter is 45cm.

1. in the word perimeter, what is a 3 letter word that is similar to what the perimeter is.

per
rim
met
meter

Explanation:

The word "Perimeter" refers to the total length around a shape. The term "meter" is related to measurement of length. Among the options, "met" is a 3 - letter part of "meter" which is conceptually linked to the idea of measurement (as perimeter is a measurement of the boundary length). "Per" is just a prefix, "rim" has no relation to measurement, and "meter" is a 5 - letter word.

Answer:

met