Answer:
118.3 m²
Step-by-step explanation:
Step 1. Calculate the <em>semiperimeter</em> (s).
s = (p + q + r)/2
s = (17 + 18+ 15)/2
s = 50/2
s = 25 m
===============
Step 2. Calculate the <em>area</em> (A).
Use <em>Heron’s formula</em>:
A = 118.3 m²
Im certain The answer is -4
Let me know if im wrong :)
120
It’s like counting by 3’s and adding a 0
3,6,9,12
30,60,90,120
x = 18
25 + 20 = 45
Proportions:
45 ⇒ 50
20 ⇒ x
x = 45*20/50
2 : 5
divide by five for both