Hello,
if we use Heron's formula:
p=(7.2+5.9+11.2)/2=12.15
Area=√(p*(p-a)(p-b)(p-c))
=√(12.15*(12.15-7.2)(12.15-5.9)(12.15-11.2))
=√357,09609375
=18,896986366878714557972599553433≈18.90
So i suppose Answer=D (with an error of 0.01)
Answer:
rgerhttyt
Step-by-step explanation:
htrhtrhtrhtrh rthtrh
Answer: A
48+ 36 = 84
84/4 = 21 groups
there are 21 groups of 4 balloons
Answer:
14
Step-by-step explanation:
rectangle 8
triangle 6
Answer:
![c=20](https://tex.z-dn.net/?f=c%3D20)
Step-by-step explanation:
The diagonals of a rectangle always bisect each other. Therefore, we can set
:
![c=4c-60,\\-3c=-60,\\c=\fbox{20}](https://tex.z-dn.net/?f=c%3D4c-60%2C%5C%5C-3c%3D-60%2C%5C%5Cc%3D%5Cfbox%7B20%7D)