Question

3. is the following definition of complementary reversible? if yes, write as a true biconditional.
complementary angles are two angles whose sum measures to 90degrees

a.) the statement is not reversible
b)yes, if angles are complimentary, then their sum measures to 90
c.)yes, angles are complimentary if their (and only if ) their sum measures to 90
d.) yes, angles are complimentary if and only if their measures are the same


4. which biconditional is NOT a good definition?
a) an angle is obtuse if and only if its measure is greater than 180
b)an angle is a right angle if and only if its measures is 90
c)an angle is acute if and only if its measure is between 0 and 90
d)two angles are congruent if and only if their measure are the same

7. what is a counter example for the conjecture
Conjecture: any number that is divisible by 4 is also divisible by 8

a)24
b)40
c)12
d)26

Answer 1

answer
3) a
4)d
5) b
sure 100%

Answer 2

The rotational symmetry of a shape explains that when an object is rotated on its own axis, the shape of the object looks the same.

Hope it will be helpful :)