Answer:
64 degrees
Step-by-step explanation:
The right angle must be 90 degrees
The total degrees of a triangle must be 180
90+26=116
180-116=64
Answer:
see below
Step-by-step explanation:
Closed under addition, subtraction and multiplication
Not closed under division :-
for example 3/4 = 0.75 which is not an integer
Answer:
15
Step-by-step explanation: