Question

find the perimeter of the triangle. round to the nearest tenth if necessary.
9
7
7.2
a. 46.4
b. 23.2
c. 28.2
d. 63

Explanation:

Step1: Recall perimeter formula

The perimeter $P$ of a triangle is the sum of the lengths of its sides. So $P=a + b+ c$, where $a$, $b$, and $c$ are the side - lengths of the triangle.

Step2: Identify side - lengths

Here, $a = 9$, $b = 7$, and $c = 7.2$.

Step3: Calculate perimeter

$P=9 + 7+7.2=23.2$

Answer:

B. 23.2