6 is right
7 is wrong
8 ??
A.p=154-32(2xy)
B.p=154-(32x2)-y
C.p=154-2(32+y)
D.p=154-(yx2)-32
B
7.Which statement is not true about polygons
A.if all the angles of a traingle are congruent then the measure of each angle is 60
B.If a triangle has a right angle, then both of the other angles are acute
C.If a figure is a rectangle then the sum of the measures of 2 angles is 180
D.if a quadrilateral has exactly 2 obtuse angles then each of the other angles is a right angle
C
8.The circumference of a circular garden is 32 feet. Which of the following expressions best represents the radius of the garden?
A.32/pi
B.32xpi
C.32/2pi
D.32x2pi
pi=3 for what Im learning
7 is wrong
8 ??
In this case, the circumference is given as 32 feet. So, the equation becomes 32 = 2Ï€r.
To isolate the radius (r), you need to divide both sides of the equation by 2Ï€.
So, the equation becomes: r = 32 / (2Ï€).
Now, let's simplify the expression given in the answer choices using the value of π as 3.
A. 32/Ï€ = 32/3. This is not the correct expression because it does not match the simplified form of the equation above.
B. 32 * π = 32 * 3 = 96. This is not the correct expression as it is missing the division by 2.
C. 32 / (2Ï€) = 32 / (2 * 3) = 32 / 6 = 16/3. This is the correct expression for the radius.
D. 32 * 2Ï€ = 32 * 2 * 3 = 192. This is not the correct expression as it is missing the division by 2.
Therefore, the correct expression that represents the radius of the garden is C. 32 / (2Ï€).