Answer:
You need to find the radius first,
Half of 23 is = 11.5
Formula you must remember when finding area of circle is:
πr^2
(pie (3.14 or 22/7) x radius squared)
Our pie is 3.14 because they said to use it in this particular question.
3.14 x 11.5^2 (remember we are making our radius squared) <--- Before
Let's evaluate first:
3.14 x 132.25 <--- After evaluating
So, 3.14 x 132.25 = 415.265 <----- your answer
_______
The classification of the triangle is based on the relationship of the square of the longest side to the sum of the squares of the two remaining side. This is shown below,
a² + b² ___ c²
Substituting the values,
5² + 7² ___ 8²
74 > 64
Because of this relationship of the squares of the sides, the triangle is OBTUSE. Therefore, the answer is letter C.
Answer:
8.51 units
Step-by-step explanation:
Given:
Length of BC can be obtained using distance formula.
For two points 
and 
, length of AB is given as:
Plug in 2.2 for 
, 4.4 for 
, 5.6 for 
, and -3.4 for 
. Solve for BC
Therefore, the length of BC is 8.51 units.
Answer:C
Step-by-step explanation:
