Question

what is the perimeter? if necessary, round to the nearest tenth. centimeters

Explanation:

Step1: Find side length a using Pythagorean theorem

$a=\sqrt{7.5^{2}-6.3^{2}}=\sqrt{(7.5 + 6.3)(7.5 - 6.3)}=\sqrt{13.8\times1.2}=\sqrt{16.56}\approx4.1$

Step2: Calculate the perimeter

$P=7.5 + 6.3+4.1 = 17.9$

Answer:

$17.9$