Yes it's true because:
TSR and RQP is alternating tringle
TSR & PQR is perpendicular
Answer:
Step-by-step explanation:
1.
Area of shaded region = Area of external rectangle - Area of internal rectangle

2.
Let the width of the rectangle be x inches.
Therefore, length of the rectangle = (x + 3) inches
A.
Area of rectangle
B.
Width of rectangle = 4 inches
Length of rectangle = 4 + 3 = 7 inches
Area of rectangle = 7*4 = 28 square inches.
Answer:

Step-by-step explanation:
You would use the equation, 
r= radius, n = number of sides
Answer:
(.5,3.5) is the center and 4 is the radius
Step-by-step explanation:
(X-0.5)^2+(y-3.5)^2=16
This is written in the form
(x-h)^2 + (y-k)^2 =r^2
where (h,k) is the center and r is the radius
(X-0.5)^2+(y-3.5)^2=4^2
(.5,3.5) is the center and 4 is the radius
I'm not very sure but I think you do length times width times heigth then divide it by 2.