I hope this helps and is right!
4 times a number is 4n then we want 5 less than that.
answer: 4n -5
Answer:
28
Step-by-step explanation:
Let "a", "b" and "с" be sides of the triangle ("с" is the longest side).
The triangle will be:
right if a² + b² = c²
аcute if a² + b² > c²
obtuse if a² + b² < c²
We have a=9, b=12 and c=15
9² + 12² = 81 + 144 = 225
and
15² = 225
225 = 225 ⇒ right triangle.
I can tell you how to work out 3)
so each side is 4 since 12÷3=4.
to work out the area you need the perpendicular height (line that goes through the middle of the triangle).
to do this you need SOHCAHTOA.
so in this case you use sine and angle is 60 since its an equilateral
sin 60=×÷4
x=sin 60 × 4
Answer:
3.87 ft = Length of unknown side of the right triangle.
Step-by-step explanation:
Given,
Hypotenuse = 4 ft
Base = 1 ft
Altitude = x
Hypotenuse² = Base² + Altitude²
4² = 1² + x²
4² - 1² = x²
16 - 1 = x²
15 = x²
√15 ft = x
3.87 ft = x
Hope it helps ⚜