Answer:
23°
Step-by-step explanation:
Let the interior angles of ΔABC be referenced by A, B, and C. The definition of point D means that ΔDAB is an isosceles triangle, so we have the relations ...
A + B + 118 = 180 . . . . interior angles of ΔABC
A = B +16 . . . . . . . . . . base angles of ΔDAB
Using the expression for A in the second equation to substitute into the first equation, we get ...
(B+16) +B +118 = 180
2B + 134 = 180 . . . . . collect terms
2B = 46 . . . . . . . . . . . subtract 134
B = 23 . . . . . . . . . . . . divide by 2
m∠ABC = 23°
Answer:
4
6
8
9
10
12
14
Step-by-step explanation:
any number that is not a prime number
The only expressions that are equal to 4√5 are
2√10
3 × 5^1/2 + 5^1/2
4 × 5^1/2
Answer: each book costs $13
Step-by-step explanation:
dividing 65 by 5 gets the answer