If a triangle has sides of 7 cm and it is an equilateral you can draw a line right down the middle to form two congruent triangles.
These smaller triangles have a hypotenuse of 7cm and a base of 3.5 cm (7/2)
To work out the height, use Pythagoras’ theorem.
a^2 + b^2 = c^2 where c is the hypotenuse and a and b are the other two sides
7^2 - 3.5^2 = 36.75
Square root answer
= 6.06 cm
That’s the height of the triangle
Area of a triangle is base x height divided by 2
So 7 x 6.06 = 42.43…
/2
= 21.2 cm^2 to one d.p
Hope this helped!
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The percentage Change is a increasing ( 30.26)
Answer:
Yes, the distance from the origin to the point (8,√17) is 9 units.
Step-by-step explanation:
The equation of a circle centered at the origin with radius , r has equation:

Since the circle passes through (0,-9), the radius is 9 units because (0,-9) is 9 units from the origin.
We substitute the radius to get:


If (8,√17) lies on this circle, then it must satisfy this equation:

This is True.
This means the distance from (8,√17) is 9 units from the origin.
Answer:
18 month loan with a 13% annual simple interest rate
Step-by-step explanation:
Answer:
Step-by-step explanation:
-the parabola opens downward because a=-3 is negative
-the vertex is at (0, -2)
-axis of symetry is the y-axis so is x=0
-the y-intercept is at (0,-2)
-has imaginary solutions you can find using quadratic formula
If you go to desmos.com, click on graphic calculator and add threre your equation you cand check your answers