Answer:

Step-by-step explanation:
<u><em>The picture of the question in the attached figure</em></u>
The point P is the center of the circle (the drawing is not a scale )
step 1
Find the measure of angle ∠CPD
we know that
---> by supplementary angles (form a linear pair)

step 2
Find the measure of arc DC
we know that
<u><em>Central angle</em></u> is the angle that has its vertex in the center of the circumference and the sides are radii of it
so
----> by central angle
therefore

Answer:
yes
Step-by-step explanation:
yes
90 degrees
the diagonals intersect at right angles
Answer:
No
Step-by-step explanation:
In order for there to be a right triangle formed, this must satisfy pythagoran's theorm thingy:
a^2+b^2=c^2
7^2+15^2=274
22^2= 484
since 274 isnt equal to 484
There is not a right triangle formed here
Answer:
8.0023x 10^4
Step-by-step explanation:
80023
to get to the first place number you have to move the decimal 4 times and if it looked like this .80023 it would be 10^-1 going down moving places back wards