Question:

What kind of angle is shown by an opened book whose measure is greater than 90°?

Answer:

b. obtuse angle

Solution:

45° up and below: acute angle

90° : right angle

90° up: obtuse angle

180° : straight angle

Question:

What kind of angle is formed by the corner of a square table?

Answer:

c. right angle

Solution:

the corner of square table always square

The corner of square table has 90° or right angle

Explanation:

hope it helps