Answer:

Step-by-step explanation:
The triangles are drawn below.
CD is perpendicular to AB as CD is height to AB.
Therefore, angles
°
So, triangles ΔCBD and ΔCAD are right angled triangles.
Now, from the right angled triangle ΔABC,

From ΔCBD,
is same as
.
So, 

Now, from ΔCAD,
is same as 
So, 

Hence, the unknown angles of both the triangles are:

Answer:
He gets 2.4 cups. This is a case of inverse proportion
Step-by-step explanation:
Hope this helps! If you need extra info, just comment me for an explanation
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Answer:
volume before window is taken out = lwh
volume of window is w^3
total volume is..... as given in pic
this is right
...............
Answer:
15 feet
Step-by-step explanation:
Perimeter = All outside lengths added together
We know that the shape is a square, and squares have 4 sides.
So, divide 60 by 4.
60 / 4 = 15.
The length of one side is 15 feet.
Step-by-step explanation:
1minute=2lap
30lap=30/2
=15minutes