Answer:
Step-by-step explanation:
sides =8 cm, 17 cm and 15 cm
Area of triangle by Hero's Formula,
S=a+b+c/2
S=17+8+15/2
S=40/2
S=20
A=
A=
A=
A=
A=60 
Answer: (-2 -9)
Step-by-step explanation:
Have no time
Answer:
37
Step-by-step explanation:
I'm having trouble explaining this one, sorry