Answer:
yes it is because the second triangle is the base and the other three triangles are the sides of the three dimensional shape
Answer:
B = 73°, c = 107°, d= 107°
Step-by-step explanation:

That's an interesting fact but what is your question that's what I'm curious about?
Answer:
17.37
Step-by-step explanation:
y varies inversely as the square root of x
Mathematically:
y = k.root x
We first find k here
To find k, we were made to know that y is 21 and x = 361
k = y/root.x
k = 21/root. 361
k = 21/19
now what is y when x = 247
From y = k.root x
y = 21/19 * root 247
y= 21/19 * 15.72
y = 17.37
Rewrite in standard form using (h,k) to find the vertex.
(3,4) is the answer.