There are nine.
1 turn = 4 right angles so 5 turns = 20 right angles.
1
16
8
In a three-quarter turn, there are three right angles. A right angle measures 90 degrees, so in a full turn (360 degrees), there are four right angles. Therefore, in a three-quarter turn (270 degrees), there are three right angles, as each right angle is 90 degrees.
Each right angle (90o) has a turn, so the answer is 15 turns. But, as a square can only have 4 right angles, 15 right angles would need to spiral (squarely) like stairs in a tower.
A right angle is a turn of 90 degrees.
12
4 right angles, no other angles.
The right angle of a right-angle triangle, like all right angles, is 90 degrees or one quarter of 360 (a full circle). All the angles of any triangle will add up to 180 degrees.
Two.
It has 6 angles, none of which are right angles.